Malicious PDF — malware analysis report

Static analysis result for SHA-256 84dd752370718067…

MALICIOUS

PDF

67.6 KB Created: 2020-12-15 16:40:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: d23d6132deaf3023f6fe2fcd755abb68 SHA-1: d89c2d86983eb1201083750e711f16d59bd37bf0 SHA-256: 84dd752370718067f95b986bfd34b074de555215a27daa1b598a2f0e142dc5ef
164 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' suggests the document is designed to host a large number of external links, likely for SEO spam or phishing. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a phishing or malicious redirection attack. The document body contains garbled text, suggesting it's not intended for direct user consumption but rather as a container for malicious links.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://trafftec.ru/strik?utm_term=i+bite+my+thumb+at+you+monty+python PDF link annotation
    • https://pisanofinupu.weebly.com/uploads/1/3/1/4/131437881/jupamuzu-pojibosas-lejato-merusikifevoj.pdfIn PDF document text
    • https://difiraboveju.weebly.com/uploads/1/3/4/5/134508976/63f04925657e19b.pdfIn PDF document text
    • https://xeludelibiw.weebly.com/uploads/1/3/4/3/134371965/3478299.pdfIn PDF document text
    • https://lituveso.weebly.com/uploads/1/3/4/3/134362288/9f3f245.pdfIn PDF document text
    • https://misamizejip.weebly.com/uploads/1/3/4/3/134348089/3605483.pdfIn PDF document text
    • https://zewuxufasebi.weebly.com/uploads/1/3/4/3/134320084/zosimotepoxavoz_begujimedatadok_milidegogubopog_tikag.pdfIn PDF document text
    • https://namoxatiki.weebly.com/uploads/1/3/4/4/134477177/62e41e14d1c3ec.pdfIn PDF document text
    • https://texolobalow.weebly.com/uploads/1/3/4/5/134597330/2dc6318.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0bcfb2e537a05ef083615/t/5fc5e6583c6ccf69f32b36df/1606805081534/42644644364.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc100ee92c50b1a1e781c95/t/5fc6e2843ac9c763f4c73c19/1606869639132/legion_tower_defense_warcraft_3.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe126918e72e5fdb9e93a9/1606292075254/strikeforce_kitty_league_kizi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4c2f8c30a162e0c6b4525/t/5fc97eedfedaa13a4857f909/1607040753116/ultimate_knockout_race_online.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc385e368612547ed6e891e/t/5fc81a202dd5737571a6d5e2/1606949409631/80746336331.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc28402be9b69395115071f/t/5fd1c2ae9a9e5443ac7a5f8f/1607582383307/clash_of_clans_account_generator.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_off0000cb31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB31 4932 bytes
SHA-256: deea69e94830ab7aaf99363e4dcb13e1c4f0b15a9ba39b03974beed1318de3e6
font_01_sfnt_off0000dbda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBDA 11084 bytes
SHA-256: 74ee35250e94958fa2c51fe025f6bf9d664f265f26a1793b625c930c176bf282

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