Malicious PDF — malware analysis report

Static analysis result for SHA-256 d22dbb6918958e41…

MALICIOUS

PDF

63.3 KB Created: 2020-11-26 01:51:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e5e7f97563b95b14739bbefe1298244f SHA-1: 95be59f2bd00d6a33ab95f8ff870dc582efc3303 SHA-256: d22dbb6918958e41b2a1cb27e3d9ec28935216097d6688fc1d9e76e2a6a6a1eb
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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/123?utm_term=karma+police+lyrics PDF link annotation
    • https://wudizibi.weebly.com/uploads/1/3/4/4/134477582/2265967.pdfIn PDF document text
    • https://lisefemibumosu.weebly.com/uploads/1/3/4/3/134339955/8659590.pdfIn PDF document text
    • https://kevujabuguve.weebly.com/uploads/1/3/4/7/134745112/jodujuradirereve.pdfIn PDF document text
    • https://todurudivi.weebly.com/uploads/1/3/4/3/134344361/xomosafa.pdfIn PDF document text
    • https://wifivufadabigo.weebly.com/uploads/1/3/4/5/134522009/siviwidoxomajelilim.pdfIn PDF document text
    • https://sanuvexugivi.weebly.com/uploads/1/3/1/6/131606490/judoj_renezexo_xozemi_fagamaga.pdfIn PDF document text
    • https://peroleliviw.weebly.com/uploads/1/3/4/6/134648746/4856560.pdfIn PDF document text
    • https://doluxofaxomivu.weebly.com/uploads/1/3/4/7/134715621/6ee895bde8d15a4.pdfIn PDF document text
    • https://kuvegegujumil.weebly.com/uploads/1/3/4/3/134367432/01aa81b20c30bc8.pdfIn PDF document text
    • https://taxajadotediru.weebly.com/uploads/1/3/0/8/130873824/2617268.pdfIn PDF document text
    • https://buvijolijesikuv.weebly.com/uploads/1/3/4/6/134602818/jerotewopomugivesup.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/b3afbacd-49b4-4c3c-9e3f-2dee8d138e5a/97262197110.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce47e4f1-3959-43d7-8aad-cf5d589cd595/ver_dr_house_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcaf277d-88da-4ab3-b23e-47d4fb1c1728/8040426091.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b316e48f-782f-406f-be31-ff2ec75bdb53/wasujegokadixagu.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bb50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB50 5152 bytes
SHA-256: cebad65b4067227f70246b039d1741398d2eb0e22a0532513a961cf3d1514c19
font_01_sfnt_off0000cccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCCC 10348 bytes
SHA-256: 042d62ff2c8f73a7d05c6d7939406170976f34db0e95e37d3d3f3efee673cf12

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