Malicious PDF — malware analysis report

Static analysis result for SHA-256 eede88c5532aebbd…

MALICIOUS

PDF

73.6 KB Created: 2021-06-09 02:23:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 7dcc2e0b4decb91d61c6ec56ffcbefe8 SHA-1: ae5f13ff712fa39a537890250bc7911b520ddac5 SHA-256: eede88c5532aebbd4d7499c2cf5ad021320e3f34eea8bffd0b18fc9d1c6dd07c
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, identified as a link farm. The ClamAV detection and ML classifier strongly indicate maliciousness, with the links likely serving as a distribution mechanism for phishing or malware. The presence of multiple Weebly-hosted PDFs suggests a coordinated effort to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://chcial.ru/pbw?utm_term=competency+based+interview+answers+examples PDF link annotation
    • https://xipunozelizu.weebly.com/uploads/1/3/1/3/131382486/suxugoresajusosimomo.pdfIn PDF document text
    • https://majivuwuwu.weebly.com/uploads/1/3/2/6/132683475/5cddf512e7.pdfIn PDF document text
    • https://wapawovukeped.weebly.com/uploads/1/3/5/3/135333371/xojoxer-metab.pdfIn PDF document text
    • https://turomanusogagi.weebly.com/uploads/1/3/1/4/131453559/jutoxuvinojom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424010/normal_600ef6bbdb783.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426690/normal_606d6c4f0c414.pdfIn PDF document text
    • https://wifirinopemuv.weebly.com/uploads/1/3/4/7/134762260/7125281.pdfIn PDF document text
    • https://senuwisaf.weebly.com/uploads/1/3/4/0/134018119/495110a.pdfIn PDF document text
    • https://bitoranajezope.weebly.com/uploads/1/3/1/4/131453137/lisanix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443598/normal_604f74aa248ec.pdfIn PDF document text
    • https://lerorenoj.weebly.com/uploads/1/3/5/3/135390996/ripepep.pdfIn PDF document text
    • https://gulemexaw.weebly.com/uploads/1/3/4/3/134360266/gewopafez_rufufibaj_perigubifufuzef.pdfIn PDF document text
    • https://wozexapumodokeb.weebly.com/uploads/1/3/0/7/130738903/wixuxajelor_mofubipulutupag_zolemu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/42004a9c-bfe3-494c-ba1c-8797976342a0/jisedizagaxalufezafuxune.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43b46bef-b0e1-479d-89d1-b7486241b441/the_danger_of_a_single_story_ted_talk_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd28fd58-7abf-4ab9-a2a5-3fbac6c8a874/optiplex_745_drivers_windows_7_32_bit.pdfIn PDF document text
    • http://bajaduxaxusi.pbworks.com/f/17745156395.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ee09013-102e-4af1-b5be-dee3a14cc0a5/59534957585.pdfIn PDF document text
    • http://werinenimuta.pbworks.com/w/file/fetch/144504018/digolosiduxuwulo.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_off0000e254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE254 5588 bytes
SHA-256: 47cf8c33eee648735c1add0eecaa2b87ebddd177ce69941504b9ba84946f5795
font_01_sfnt_off0000f549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF549 10448 bytes
SHA-256: b68fd54cbc7d23df182c7d5e2be82e97fbdb71164c550284ccd1420875cb6c18