Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e5e6d02f6756a74…

MALICIOUS

PDF

87.4 KB Created: 2021-07-04 07:19:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 1e797e6581724a3cbfff0cf7a7479221 SHA-1: c2087af2f55bbdde6743e4a2c0f998f9465e6766 SHA-256: 1e5e6d02f6756a743247220259f279fc948bc71206a43cac2f4833302223478c
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many of which are algorithmically generated and point to compromised websites or IP addresses, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were directly extracted, the nature of the embedded links and the PDF structure align with common phishing lures designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://drafthe.ru/uplcv?utm_term=is+it+good+to+eat+an+apple+for+breakfast PDF link annotation
    • https://mimpishio2bet.com/contents//files/31005789461.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/f92ef4feffb082c10bc426845bb3b4e3/bukatowofiripufizusot.pdfIn PDF document text
    • http://grandchainfamilyfoundation.org/clients/85333/File/21088324942.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/d7d8765eb22feecff4de4714828ac61b/36335100107.pdfIn PDF document text
    • http://terminsk.by/pics/files/87556717742.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c414c312e8d---gikonusasubosokekefaf.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1608b5c84784d1---26346536972.pdfPDF link annotation
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/0c44cac506dda56b5a07cf538a70e0d1/40217018629.pdfIn PDF document text
    • http://0965818789.com/CKEdit/upload/files/21139891751.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160d491fa5a547---60771477075.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfcaf1c9d8---lenuvebif.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609b555fa5677---zupuke.pdfIn PDF document text
    • http://ambulatorioveterinariocigliano.com/userfiles/files/xevururonoxoludizud.pdfIn PDF document text
    • http://utpcomp.ru/uploads/files/murumijabunoworixat.pdfIn PDF document text
    • https://xn--z4qq44i.tw/upload/actfiles/mepup.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/68ddeae50b63fccb6fd066acdb559cb2/9789167007.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/najotavuwup.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b652e875752---jepewadajaxovipepav.pdfIn PDF document text
    • http://asokmontridental.com/userfiles/file/64398335566.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/71196930280.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021051602471570.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e3f62a5eb---84104617099.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc46088b36---87136592885.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA64 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10276 16720 bytes
SHA-256: 5beda74176debbda4bd660087c8d406eb66c15c57eab62f56b83ca1cc991acab
font_02_sfnt_off00012d70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D70 10856 bytes
SHA-256: e4a39280e3ead3c893919599c39dbab60e701df7e37af0e8cabab3f55f92e281
font_03_sfnt_off00014621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14621 2064 bytes
SHA-256: 46b41152c66239606199adeeb56fa6f0c95586cce1373289504480bb8e1ff93d