Malicious PDF — malware analysis report

Static analysis result for SHA-256 9de02fe14cdf746d…

MALICIOUS

PDF

90.5 KB Created: 2021-09-16 00:36:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a0c17149f8b268ef8405658ac8b51624 SHA-1: 73a38bbb657bb53b0a12239a721bcd3a4b1bbcc7 SHA-256: 9de02fe14cdf746d8bbdfbeaeeb8a2491425b9e938c41fa067c9117f19ad74dd
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or raw IP addresses, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely involving the exploitation of PDF vulnerabilities to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://allytemp.ru/uplcv?utm_term=android+1+zombie+games PDF link annotation
    • http://restavratorstvo.com/ckfinder/userfiles/files/38204104602.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/0m7a3hce29gamf7dgftfuvh665/xosasemibeneb.pdfIn PDF document text
    • https://marjoyunlar.com/calisma2/files/uploads/78241026846.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/57543458386.pdfPDF link annotation
    • http://sooam.com/files/fckeditor/file/205007826461329028a514b.pdfIn PDF document text
    • http://myphammonly.com/luutru/files/3928464562.pdfIn PDF document text
    • https://digireg.si/upload/1216632801.pdfIn PDF document text
    • http://cableesmaltado.com/d/files/xejalid.pdfIn PDF document text
    • http://camel-republic.com/media/userfiles/files/56192230329.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613323041c03c---neginep.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/161419afce9e62---93529057303.pdfIn PDF document text
    • http://raczcsalad.hu/files/12187926910.pdfIn PDF document text
    • http://zgkimsteszew.pl/img/upload/files/7113909854.pdfIn PDF document text
    • http://viviapalermo.com/userfiles/files/29314510745.pdfIn PDF document text
    • https://detector-billetes.com/Imagenes/file/konadipogikisugokuf.pdfIn PDF document text
    • https://ahirealty.in/admin/userfiles/files/zixezaj.pdfIn PDF document text
    • http://lawfirm.vn/MINH/user_files/file/kumuwetibof.pdfIn PDF document text
    • http://escrima-rlp.de/userfiles/file/26597687067.pdfIn PDF document text
    • http://wmasgroup.com/userfiles/file/gidewozurunufotid.pdfIn PDF document text
    • https://blokhol.com/upload/files/tepotebidimedavalulibara.pdfIn PDF document text
    • http://dataction.org/demo/dataction/media/17562859364.pdfIn PDF document text
    • http://algarestofos.pnh.pt/js/ckfinder/userfiles/files/40042842567.pdfIn PDF document text
    • http://adhdesign.de/userContent/files/20210908185704-weliwirezilofitosenogasef.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139199245f2c---vonurixibazudegofomegiw.pdfIn PDF document text
    • http://atek-ent.com/upload/file/60036231121.pdfIn PDF document text
    • http://www.cst.rnu.tn/js/ckfinder/userfiles/files/tifevufutemaboke.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f06e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF06E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10880 22924 bytes
SHA-256: fa7c362f54c70c7243990b02f4a6f7c09adabc785d69a77d0282c701c09b1cbf
font_02_sfnt_off0001441e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1441E 10680 bytes
SHA-256: ce70fad60300a9217f40abf8be3649eff1606c1d0f9661273086e072a122cfd9