Malicious PDF — malware analysis report

Static analysis result for SHA-256 3516818118e22a95…

MALICIOUS

PDF

59.5 KB Created: 2020-11-10 00:37:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1d48460fc9692548001c926d54e4308e SHA-1: 81d63edf44e30519aed22c21e315270468173895 SHA-256: 3516818118e22a9543080d866c8afd14597de9fd4378c08f59a1934599b4212c
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of numerous external links, including one pointing to 'trafftec.ru', suggests a link farm or redirection mechanism. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a phishing or malicious content delivery attempt, possibly leveraging embedded JavaScript for execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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/aws?keyword=hp+omen+880-130+drivers PDF link annotation
    • https://kilunifogewawo.weebly.com/uploads/1/3/4/4/134457757/xolubiluputukugizu.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/baposivarabuj/from_inquiry_to_academic_writing_4th_ed.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/merriam_webster_dictionary_apk_pro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b32546a-fd67-4ce8-abbe-59d9bbe07a86/58572411348.pdfIn PDF document text
    • https://s3.amazonaws.com/wepeliniru/the_atom_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f66bcfdc-4d27-4d18-a913-d98077518381/55928284456.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/class_11_biology_chapter_6_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/weslo_cadence_r_5.2_treadmill_belt.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/amar_ujala_newspaper.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/fsu_immunization_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c88693a4-e906-4f6c-b8cd-5e96e5b36db1/vofopukaxatifu.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/82203691749.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/brene_brown_dare_to_lead_workbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d167d5b5-753f-4fd7-b056-ee7a7b09f911/2319842631.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_off0000ac6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC6D 5468 bytes
SHA-256: 80cad5d64fc3acb325b3fb45d5499e53b647187cd5585575b05b37820afd264a
font_01_sfnt_off0000bf03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF03 10040 bytes
SHA-256: e9301ba988ab7ae67e9ada0fdd9fe3059b0349d8f717f5d7d17d0425b46a119d

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