Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c4fa040530f77c1…

MALICIOUS

PDF

104.2 KB Created: 2021-03-17 21:13:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7d4b3d76c55bb55e00d9c1c0dbad5288 SHA-1: 573fe15aa9c16335508140d1824833ef204d2c88 SHA-256: 3c4fa040530f77c144cc2db21c149a09af50482d1026ab090611434ce728828c
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 0.9995

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://jacksth.ru/strik?utm_term=who+are+the+actors+in+the+nordictrack+commercial PDF link annotation
    • http://bupro.asia/54484186436ekj3w.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459774/normal_5ff4061e5251a.pdfIn PDF document text
    • http://sale20.site/boss_gt_1000_patch_downloadnfy8v.pdfIn PDF document text
    • https://cdn.sqhk.co/muligumixe/if7roid/best_filter_app_like_snapchat.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369802/normal_5ff780ac85049.pdfIn PDF document text
    • https://cdn.sqhk.co/desogepupema/ggjhjiD/frontline_tales_the_great_offensive_attacks.pdfIn PDF document text
    • http://cabinetsly.xyz/arris_modem_login_dg860afsdyo.pdfIn PDF document text
    • https://cdn.sqhk.co/totafeta/7oP6jaP/gaxuzizedezin.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwumixe/dghicih/51584259985.pdfIn PDF document text
    • http://begajezi.22web.org/wilojokilure.pdfIn PDF document text
    • https://cdn.sqhk.co/buvovemif/digAgiv/dreamlines_mein_schiff_4.pdfIn PDF document text
    • http://reniloze.iblogger.org/gemodotivirupi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://65fca3b3-7ce8-4d56-9bc8-ebe46cc5223b.filesusr.com/ugd/f6ed72_41eea45bddef40ac87f9f32479c0fdf4.pdf?index=trueIn PDF document text
    • https://b1b0174c-961c-4936-87f6-765e1132391e.filesusr.com/ugd/6cf804_e0ef3159787c444382e48cf0347a673b.pdf?index=trueIn PDF document text
    • https://cf4de027-7369-46c2-bf93-d69cabef2b5e.filesusr.com/ugd/868b90_61375ecaed2f4eba9842c3bfac1e67eb.pdf?index=trueIn PDF document text
    • http://jatijadimob.rf.gd/85874120884.pdfIn PDF document text
    • http://tedijafubivot.epizy.com/pafapogot.pdfIn PDF document text
    • https://b2d1eea7-aef5-47fc-962c-88b5513ecafc.filesusr.com/ugd/3a57bc_4f2e93574f6e4bb9ac3c76452e04b8ac.pdf?index=trueIn PDF document text
    • https://34e223d5-b18a-4f89-96b3-7c58aa965d90.filesusr.com/ugd/440e29_6da48f0db02f4ffbb9200ca98045c407.pdf?index=trueIn PDF document text
    • https://878ee1be-828d-48b9-a24a-84283cf66a1c.filesusr.com/ugd/86936c_08734ac169154515ba725a9c77550ddd.pdf?index=trueIn PDF document text
    • http://dufatiji.rf.gd/18059293250.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001480d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1480D 3188 bytes
SHA-256: 09c1c05a6bb7a9d598c20b291b58e95f7449055a487dd13c3878ff15832a2dcb
font_01_sfnt_off00015349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15349 5256 bytes
SHA-256: bb9b33f41ff10a547cbdb9406bcc67db5eb4aad1dd353d5a9b37556d56895fea
font_02_sfnt_off00016507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16507 13016 bytes
SHA-256: aa887257ea4ca20e914512c2e08f4ac3343db4669a072eddac31eaae8a55b149

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