Malicious PDF — malware analysis report

Static analysis result for SHA-256 06bfdc48b9e138f8…

MALICIOUS

PDF

87.7 KB Created: 2021-05-30 17:53:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f49d3060509ddf2286d9be0f3405d0e4 SHA-1: 767d41ae858a723489869e14ba8983f00ac2dd23 SHA-256: 06bfdc48b9e138f8cdc193851926343cef465dc58172d3fafd8fe2e6c7074af6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 7

  • 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.
  • 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://xezojetit.ru/strik?utm_term=how+long+to+turn+into+vampire+skyrim PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481841/normal_5fd2c31c2b50d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468553/normal_604796e577b44.pdfIn PDF document text
    • https://vagajexaxe.weebly.com/uploads/1/3/4/3/134359414/tibirijezimumenajef.pdfIn PDF document text
    • https://warevinigipa.weebly.com/uploads/1/3/4/8/134898994/kuzupevub.pdfIn PDF document text
    • https://mizemajawoxulu.weebly.com/uploads/1/3/1/4/131437858/4908043.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380691/normal_5ff57ce527b87.pdfIn PDF document text
    • https://semazuxogevagox.weebly.com/uploads/1/3/4/0/134017751/palagadida-denez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401971/normal_6034116d21815.pdfIn PDF document text
    • https://fadafiwu.weebly.com/uploads/1/3/5/3/135302778/d443f6392f5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456128/normal_604e049342209.pdfIn PDF document text
    • https://zasefijokadi.weebly.com/uploads/1/3/4/6/134667753/2bfa46415e67b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387056/normal_60499305a3f30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379034/normal_60242e8dd5244.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403806/normal_6051446d35d82.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389816/normal_600906f5848bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484990/normal_600cc5f1908af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456116/normal_605c6410cbcc6.pdfIn PDF document text
    • https://bofaragimemax.weebly.com/uploads/1/3/4/0/134096626/1715ece2fa513d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409827/normal_6042d0ebd2950.pdfIn PDF document text
    • https://dedotomonifagax.weebly.com/uploads/1/3/1/6/131606429/kezobofuxezuzoku.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/89554490-6f24-4fa2-9a74-b976a6101749/13686989531.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19f1994b-7247-4ec5-bbac-1545ee0cb1fb/19977619334.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/095b698d-7a76-401f-a108-8b62e1648985/after_action_review_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cb426a1-36ea-48cd-879c-4d0153684179/74457725911.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/129bb098-0752-40e8-a598-8f16321089c0/how_to_shade_a_portrait.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_off0001084b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1084B 5300 bytes
SHA-256: 1364f7aedf2b0121f211f274bd03bbb57adb970eb26d512dd04ca3eb3de38304
font_01_sfnt_off00011a5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A5B 11384 bytes
SHA-256: cab00d8e403e2210fbd456c01a2c9946c21cee50dbdefc29e622b9517c096e35
font_02_sfnt_off0001412f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1412F 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e