Malicious PDF — malware analysis report

Static analysis result for SHA-256 d74d476ba80e32cd…

MALICIOUS

PDF

72.1 KB Created: 2020-12-24 20:58:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: f93332b00c7f04b695f68bd8f29111f1 SHA-1: 77b66d297e7564de37f843499c647c534826cd27 SHA-256: d74d476ba80e32cd8f8b1f10e180442ec9f8f2b78d09d6d96f9ccf05d027b2b4
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to various external URLs, one of which is associated with APK downloads, suggesting a phishing or malware distribution scheme. The presence of numerous external links, some on disposable hosting, further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafffe.ru/aws?utm_term=apkland+sports+tv+apk PDF link annotation
    • https://xilamebi.weebly.com/uploads/1/3/4/5/134598653/wobeganuli-wopevezute.pdfIn PDF document text
    • https://vinaxana.weebly.com/uploads/1/3/4/7/134725794/6916566.pdfIn PDF document text
    • https://gakewejodum.weebly.com/uploads/1/3/4/9/134902465/dilojola_fevino.pdfIn PDF document text
    • https://fujelaxu.weebly.com/uploads/1/3/4/7/134704358/jikepafap-pobasoperovifa-xiweduj-munox.pdfIn PDF document text
    • https://garusase.weebly.com/uploads/1/3/4/6/134634063/rarekumo.pdfIn PDF document text
    • https://vejikawotepux.weebly.com/uploads/1/3/4/8/134887167/norizefilizuku_kemuxizesusujen_koluzotas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9244225a-6f8f-4f2d-ae88-3c52956c295c/55233747807.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/applied_linguistics_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca482a91-5455-4d63-8b7b-fa4c517d1ae8/14682327528.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/jinebodagidadipamugudux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a98bac5e-507f-4224-9e49-607f0494712e/66063572012.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4a93fba-9e34-4863-a53a-598c9beda0ec/giruwi.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/69392214865.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://scripts.sil.org/OFLIn 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_off0000c3fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3FD 5068 bytes
SHA-256: b7843a454f97b03fd5c4b51c876d03a6cfc68443ad50ace865c208665b872df5
font_01_sfnt_off0000d54c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD54C 12188 bytes
SHA-256: 5cbe69ce4e0aa8ce45362ab33b4843ed42647eebcbc07129106dfe3af5dfc0c4
font_02_sfnt_off0000ff11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF11 16036 bytes
SHA-256: 354dce64f07f3d7acdf6a04edf763950ffbfec4edcbb4bfe17b65a83544077bb

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