Malicious PDF — malware analysis report

Static analysis result for SHA-256 a290c218400b231d…

MALICIOUS

PDF

70.4 KB Created: 2020-11-22 18:59:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 0db808e9da0ff1c62292b45d542c22a5 SHA-1: b868ed0efa6b62481c4c6c29d8a5e3462cdaa451 SHA-256: a290c218400b231d63ce58539b9f97e39e5b87ee4b472ffb7656603c96d20bcd
164 Risk Score

Malware Insights

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

The PDF file was detected as malicious by a ML classifier and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, with one prominent link pointing to 'trafficel.ru', suggesting a phishing lure disguised as a design patterns PDF. The presence of PDF_URI and PDF_SEO_LINK_FARM heuristics further supports the malicious intent of generating traffic or distributing further malware. No scripts were extracted, but the overall structure and link farm indicate a malicious document.

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.
  • 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://trafficel.ru/aws?utm_term=design+patterns+explained+alan+shalloway+pdf PDF link annotation
    • https://dudikojegak.weebly.com/uploads/1/3/1/4/131406444/2f709ee70564e1a.pdfIn PDF document text
    • https://junovolosexev.weebly.com/uploads/1/3/4/4/134467690/pedapu.pdfIn PDF document text
    • https://mimasalidapu.weebly.com/uploads/1/3/4/4/134466186/6437454.pdfIn PDF document text
    • https://befakudi.weebly.com/uploads/1/3/4/5/134595811/xemakot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/widiku/the_entertainer_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/a_first_course_in_complex_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/sword_art_online_2_episode_11_english_dub.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/wow_cataclysm_cooking_leveling_guide_1-525.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/catalase_enzyme_function.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea41b229-a63a-4984-916d-9804722a2560/90366955007.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82f3ab22-6a7c-4a5a-9dcf-d7942c5c4283/33755269461.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/classifying_numbers_quiz.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/sifatuputirina.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_off0000d656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD656 5564 bytes
SHA-256: 2ac9474d2a1ce24d6e369988398c0a22a666aefce2c2e898f1cd6fa7584a55b5
font_01_sfnt_off0000e963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE963 10532 bytes
SHA-256: a3d4cab86b49f3765ba9a8a5e525a4a1041a3be0545327004bb3461d916eebb9

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