Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe6c8ca0b9ef1c9b…

MALICIOUS

PDF

74.1 KB Created: 2021-01-25 21:21:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b3a03fc0fc6fc33043cff8e032174c84 SHA-1: f0b3d592b9df6d012db3eebf8588732a0fd718cf SHA-256: fe6c8ca0b9ef1c9b8044094dc83a251f1569123f08c616c7a1ccbc7cc9cbd2af
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting a link farm or redirection mechanism to distribute malicious content or phish users. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffi.ru/aws?utm_term=future+will+vs+going+to+worksheets PDF link annotation
    • https://cdn.sqhk.co/kezavilageg/idvhckQ/sixozo.pdfIn PDF document text
    • https://cdn.sqhk.co/xisiwuba/ggONS0i/serakadenonupinu.pdfIn PDF document text
    • https://cdn.sqhk.co/seseniluvus/Fig4hj3/promo_for_walmart_grocery_pickup.pdfIn PDF document text
    • https://cdn.sqhk.co/faresawuf/SlCCFJI/fizupumomuwigefovena.pdfIn PDF document text
    • https://cdn.sqhk.co/puburikob/sv9gihc/duck_hunting_boat_blind_frames.pdfIn PDF document text
    • https://cdn.sqhk.co/losegiro/jhgfUhf/tewazuxivuvejesus.pdfIn PDF document text
    • https://cdn.sqhk.co/pigajifaw/RESQLgf/clash_of_crowns_ao3.pdfIn PDF document text
    • https://rakafofolobe.weebly.com/uploads/1/3/4/6/134649319/2424947.pdfIn PDF document text
    • https://baxezakeva.weebly.com/uploads/1/3/1/4/131406046/1c7a905e5fa.pdfIn PDF document text
    • https://cdn.sqhk.co/mukujoripu/nnhjjdC/soccer_heads_champions_league_2014_15_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/3HtvSPR/multi_stream_transport_mac.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fizenigapajawak.epizy.com/xolonodi.pdfIn PDF document text
    • http://latilofu.rf.gd/autobiography_example.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_off0000e6dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6DD 4908 bytes
SHA-256: e2b32c7ba9cc683b14dcfb6cc2a9780ce91c54d39bb8085f8952bc6f1c00d563
font_01_sfnt_off0000f7a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A8 10424 bytes
SHA-256: d5df2616f2d9e002a9a391d82c4e01e9d7939b47120e8242876adf48e5553609

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