Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e4881db96050f57…

MALICIOUS

PDF

66.0 KB Created: 2020-12-31 01:24:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 6f87fa14ee1fab6b1e7eed17ea919803 SHA-1: 896540a371faabeb560aa36cc0e8020e10d996f3 SHA-256: 9e4881db96050f5712f42fca32b8a56f16aa963610d37b6c42587aed9b4afc35
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 high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or SEO manipulation scheme. The embedded URLs, such as 'https://trafffi.ru/strik?utm_term=crossroads+mall+theater+waterloo+iowa', are likely part of this network. No scripts were extracted, but the PDF structure itself is used to host and distribute these 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.
  • 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://trafffi.ru/strik?utm_term=crossroads+mall+theater+waterloo+iowa PDF link annotation
    • https://zomutelisofo.weebly.com/uploads/1/3/4/7/134712892/jenatazogiwokot.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/hjjjwhf/suxerusazoj.pdfIn PDF document text
    • https://mipapipav.weebly.com/uploads/1/3/4/0/134012398/8963800.pdfIn PDF document text
    • https://gifetapajuloper.weebly.com/uploads/1/3/4/6/134682222/wojazisezemogof.pdfIn PDF document text
    • https://cdn.sqhk.co/nazopekujavi/ThaJSij/22007149913.pdfIn PDF document text
    • https://zibefaxad.weebly.com/uploads/1/3/4/5/134594794/d6886002d19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367305/normal_5f882d1810a85.pdfIn PDF document text
    • https://xinomufe.weebly.com/uploads/1/3/4/7/134706409/lafazalun-wexivan-famemerazuxiloz-xiparaw.pdfIn PDF document text
    • https://danovijo.weebly.com/uploads/1/3/4/7/134774389/5148503.pdfIn PDF document text
    • https://rumeravovavupol.weebly.com/uploads/1/3/4/6/134619367/waguwujadezovigama.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
    • https://uploads.strikinglycdn.com/files/6af969cc-9f95-46cf-a6ed-5fe4a6afb0db/manorville_homes_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38b6511d-52f2-402a-acf7-bac8fe838f34/ranidaphobia_is_fear_of_what.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/20585646158.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/derivative_graph_cheat_sheet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB855 4860 bytes
SHA-256: ab6a6bdd74a1e89bdb4dfa948c7c98fbb35897718b1e8df22c5a499804812ebc
font_01_sfnt_off0000c8e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8E7 10536 bytes
SHA-256: d2de92706bf1fdea5732f39667a7cc16db1f120738c04d56da7a0ac4775615a4
font_02_sfnt_off0000ed2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2B 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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