Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee6bcaefe73cbafd…

MALICIOUS

PDF

78.2 KB Created: 2021-02-27 20:48:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 01b5dd175a510697bb29130e1459c724 SHA-1: 9aec55170c3c2047c10ea7661601bb338a0c896e SHA-256: ee6bcaefe73cbafda8238d28be4cf523955837d4f27df1f8d759b54b415552d8
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan-like behavior. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious or phishing sites. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' strongly support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://midufefew.ru/wb?keyword=chick%20fil%20a%20starting%20pay%20fayetteville%20nc PDF link annotation
    • https://cdn.sqhk.co/wametofenuwo/eGjj6er/zombie_war_idle_defense_game_knight.pdfIn PDF document text
    • http://gelchlen.fun/paulo_coelho_biography_worksheetgtm3v.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486965/normal_5fccd1f0e8f46.pdfIn PDF document text
    • https://cdn.sqhk.co/xubupigegi/jahgd4K/pepuveni.pdfIn PDF document text
    • https://toxoladosa.weebly.com/uploads/1/3/4/4/134479392/xunuv-vogul-davujitefola.pdfIn PDF document text
    • https://puwakama.weebly.com/uploads/1/3/4/4/134474688/a969e927dbf.pdfIn PDF document text
    • http://firstsecu-paypal.com/stupid_zombies_4_mod_apk_all_unlockedwv7t1.pdfIn PDF document text
    • https://zebazowis.weebly.com/uploads/1/3/4/3/134310266/xadagidudewigaka.pdfIn PDF document text
    • https://wirosumarot.weebly.com/uploads/1/3/1/3/131398493/gimobijodeb.pdfIn PDF document text
    • https://nofuzibid.weebly.com/uploads/1/3/1/4/131453406/6077a5a5e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365642/normal_6020345bd3b5d.pdfIn PDF document text
    • http://air-calm2.club/vusewuxotetanul70gx.pdfIn PDF document text
    • https://nozudepoget.weebly.com/uploads/1/3/1/1/131163917/413b0989b58.pdfIn PDF document text
    • https://cdn.sqhk.co/xafiguzi/jaIgdji/juzididaludirerapufudezaf.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
    • 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_off0000e52e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE52E 5204 bytes
SHA-256: 609669fa504832e1543038f7cc11f1a4900aee4c51be58d75565159fd6b199e2
font_01_sfnt_off0000f6da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DA 12120 bytes
SHA-256: b52c091a2fae2dc1447696b8b2ed08cc3f9bfc843ea6dc3347a1d1f11948387e
font_02_sfnt_off00011e13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E13 4324 bytes
SHA-256: 8405bb6ca9a6fb718a2e910e1cdde4d74ac2122cab0061dc5f772322db9c7ccd

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