Malicious PDF — malware analysis report

Static analysis result for SHA-256 e54c3f820f318154…

MALICIOUS

PDF

75.5 KB Created: 2021-03-23 12:14:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8927e06bbb72598f115c4f899ef61496 SHA-1: 114e536a5aa0a5a321c736a22407c01f02c0a548 SHA-256: e54c3f820f318154656bb5b0b489be6df6e93f2da448895b692d1360dba68283
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9956

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/123?utm_term=pass+me+the+aux+cord+meme+template PDF link annotation
    • http://vipadminler.org/nifumavekoxelibu4sw1o.pdfIn PDF document text
    • http://geosen.net/wapopu8e7ug.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413242/normal_5ffb20b1d85d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408995/normal_6014b79653abe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366018/normal_6016d72b2563a.pdfIn PDF document text
    • http://leopards.space/458038461v6wif.pdfIn PDF document text
    • http://meblik.su/17754080923k4rt3.pdfIn PDF document text
    • http://dvestideyli.xyz/97438881032cldfn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407813/normal_6047376273f4b.pdfIn PDF document text
    • http://optarfes.com/97753678670395m9.pdfIn PDF document text
    • http://cosmicgig.com/xuvegun9862.pdfIn PDF document text
    • http://aydym.club/55780490997phfq6.pdfIn PDF document text
    • http://idealica-columbia.site/kozawosipukubuvogebejirutt9h6i.pdfIn PDF document text
    • http://hiziryigit.online/barclays_app_android_pta2x7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403543/normal_601f38fbaf5e8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412413/normal_5fe14ef7c92b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464314/normal_5ff615cdf423a.pdfIn PDF document text
    • http://fherixq.com/bryson_tiller_true_to_self_download6w892.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422161/normal_60215f3f9a360.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372735/normal_5fe024008e3d5.pdfIn PDF document text
    • http://cuzinfo.ru/36832411919oy3ii.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b6f97e74-198a-461d-a312-d71b9712332b.filesusr.com/ugd/a2d007_421f6191dbdc45019eab94d5ac391ec7.pdf?index=trueIn PDF document text
    • https://041c2bdd-267b-4995-9d72-d071cf2c2b2b.filesusr.com/ugd/ba0b69_c11d7ab878dc41398028f1111a581414.pdf?index=trueIn PDF document text
    • https://21e323bd-7fdd-46e9-a6c7-4880e76d7610.filesusr.com/ugd/0a51c1_e8e488b0541042bc95e0833072653156.pdf?index=trueIn PDF document text
    • https://7a6021ad-ea99-40b3-bafb-6570e045b460.filesusr.com/ugd/527ec5_41130161d276404faae014fb614e8309.pdf?index=trueIn PDF document text
    • https://5090c2af-253d-40c3-bfb7-942fc6db26b0.filesusr.com/ugd/0511f5_aa76c1934868420ba7108e323366b57a.pdf?index=trueIn 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_off0000e505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE505 5384 bytes
SHA-256: 91a3d2c99fba3287364fd16e0216884f20960c18c8e1fcf984b011ddf9e0c465
font_01_sfnt_off0000f72b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF72B 12332 bytes
SHA-256: 98888c0cdc404b21faf79d252dc1040a83f6fd29899bb70e11600a3827c300e3

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