Malicious PDF — malware analysis report

Static analysis result for SHA-256 72d63012f7ebc3d2…

MALICIOUS

PDF

73.4 KB Created: 2021-10-04 08:29:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 491c2192df58d3f4c7d0d9ed66b47ed5 SHA-1: 05d71704314a7c51183bbd59a1eb5ec000005426 SHA-256: 72d63012f7ebc3d2eb363dc4b67bd75e24dd5b7a5d6c153a06feb2f3e1a9e0ce
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous external URIs, many of which point to potentially compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and embedded URLs are indicative of a malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://sensiblemachines.com/ckfinder/core/connector/php/files/31219881673.pdf In PDF document text
    • https://pianoinprimopianofestival.com/uploads/file/dabemorimubuvubi.pdfIn PDF document text
    • http://geo-equipe.it/userfiles/files/37933807128.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1615a4293517ef---viputenekoso.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16133b8123c7f7---xewetawigefo.pdfIn PDF document text
    • http://laibros.com/ckeditor/userfiles/files/daxamuzobogijivifulebave.pdfIn PDF document text
    • http://140.121.125.49/ckfinder/userfiles/files/20210929_132331.pdfPDF link annotation
    • http://cozycornerexpress.com/uploads/files/98527791791.pdfIn PDF document text
    • http://appextskihjthj.handysociality.com/upload/files/xapujivoxovux.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161522d5e8a0e8---72994951478.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/jpnrkjmvte0ifl99be92amh6j5/80934176772.pdfIn PDF document text
    • http://www.coverseg.com/uploads/ckfinder/files/53961763859.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/0ft10uepvbv8hstliak829156f/loxiradabad.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/ec795aa98c73f02edbc68d9f284c5b7d/polirowevizamisogeli.pdfIn PDF document text
    • http://sva-jeanroze.com/xmedia/file/50441778374.pdfIn PDF document text
    • http://agama-rc.com/upload/files/76928151413.pdfIn PDF document text
    • http://asupuro.com/upload/save_image/files/lepavorikof.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/15855488405.pdfIn PDF document text
    • https://hv2barrier.com/application/third_party/ckfinder/userfiles/files/38564934377.pdfIn PDF document text
    • http://stauarchitetti.eu/userfiles/files/68968741287.pdfIn PDF document text
    • https://anjingliar2.com/contents/files/deluxodoniwi.pdfIn PDF document text
    • http://leicesterbiketec.com/userfiles/file/5540753559.pdfIn PDF document text
    • https://www.sudoku-cool.com/ckfinder/userfiles/files/papodowufen.pdfIn PDF document text
    • https://mehfermobilsaglik.com/userfiles/file/66237854387.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=strict+liability+examplePDF link annotation
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA06 10572 bytes
SHA-256: f56e675bcc947619a5cee03b505f281829cdf656c10a2400f43db2952825850f
font_01_sfnt_off0000d201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD201 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ea13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA13 18072 bytes
SHA-256: f1a3291844402610d5dee3d14d3e42fc691944e5e69990154828669c9a3492e1

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