Malicious PDF — malware analysis report

Static analysis result for SHA-256 44eb9b6fb2f8d4f3…

MALICIOUS

PDF

82.4 KB Created: 2021-04-01 12:42:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 414e35ce7a5932abeaae4f7b95c507e9 SHA-1: 8b2cc6d1d8dd60aece0a6bb02401a569e20e4935 SHA-256: 44eb9b6fb2f8d4f33d25a143e4659f3a3284c1473e0f842a08bdfa324798b972
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 0.9997

Heuristics 6

  • 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 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://maypoin.ru/strik?utm_term=johnny+the+homicidal+maniac+comic+vine PDF link annotation
    • https://cdn.sqhk.co/besawevij/ZQDmgg5/mutonekofasasegupop.pdfIn PDF document text
    • https://cdn.sqhk.co/jenotonolo/z0JjeY4/all_star_basketball_players_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/porosobof/picbAhc/gitekasumusejadefokow.pdfIn PDF document text
    • http://alisabor.design/magic_mouse_2_not_working_windows_10_bootcamp18fbd.pdfIn PDF document text
    • http://profer-opt.ru/38947545039vajt8.pdfIn PDF document text
    • http://prognoz-football.club/nolotuvegidozofaletosoejmvy.pdfIn PDF document text
    • https://semanipiji.weebly.com/uploads/1/3/5/3/135312460/e9cf8.pdfIn PDF document text
    • http://rubyshup.space/latex_appendix_documentclass_reportjkygf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455208/normal_6000b7c649ad0.pdfIn PDF document text
    • http://mesanezedid.mypressonline.com/double_bollinger_bands_strategy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457279/normal_5fdcf1767b765.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491412/normal_60260801e6831.pdfIn PDF document text
    • https://wetolobumusu.weebly.com/uploads/1/3/4/5/134579125/jimepog.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393626/normal_5ff5bc75be0c4.pdfIn PDF document text
    • https://cdn.sqhk.co/kigoxeni/hhV8bLp/larenologaguzumonukofolen.pdfIn PDF document text
    • https://cdn.sqhk.co/kewixoretuze/nidOLij/gufenivujopamorew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492897/normal_6034f85b1a9da.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://0eb00d84-361a-45dc-b346-1af5c8eb785c.filesusr.com/ugd/d79848_bb5b3c90b7144090bd3ad176cdfa99f2.pdf?index=trueIn PDF document text
    • http://jatoxat.atwebpages.com/10192079871.pdfIn PDF document text
    • https://b3079848-b07e-4d89-9244-05dfa5dd91fe.filesusr.com/ugd/3ab5ed_23bdb9daffab471ea68454de52eae05d.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FB 4844 bytes
SHA-256: e494ac4cb7124c0348b3033d4b4217a47b34ae82de61bea50a31de2f92cbe5a2
font_01_sfnt_off00010848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10848 11168 bytes
SHA-256: f47f5d34775c2751129f396fbd5ae861c7cdb062f9207a38403ab1f5f755ab03
font_02_sfnt_off00012dcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DCD 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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