Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bd86dfd473ad92a…

MALICIOUS

PDF

80.7 KB Created: 2021-05-29 21:19:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a29c30434563dca7c2f5bf2a0183069a SHA-1: 55f81e140a278a1dde068de441a00f7a6ed4fc9c SHA-256: 0bd86dfd473ad92aeb45558dc91ff1c97010405bf4fbd81999c79fa1153448c0
206 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) 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 0.9998

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://lozipotod.ru/strik?utm_term=td+bank+canada+international+routing+number PDF link annotation
    • https://nevonanopovew.weebly.com/uploads/1/3/4/3/134335048/8896851.pdfIn PDF document text
    • https://gazukevofuw.weebly.com/uploads/1/3/4/5/134597640/7808883.pdfIn PDF document text
    • https://wexegupewafux.weebly.com/uploads/1/3/4/4/134443826/1348229.pdfIn PDF document text
    • https://masagefila.weebly.com/uploads/1/3/4/5/134505888/ruluzalet_dataxulolafe_mexikunatipopul_mitakufobuj.pdfIn PDF document text
    • https://vorufiduwesonuf.weebly.com/uploads/1/3/5/3/135314955/laxiwebox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384640/normal_6029326e1dd5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477638/normal_606b823e5657a.pdfIn PDF document text
    • https://jotelozaji.weebly.com/uploads/1/3/4/4/134484012/bomabuxajid-fatimekura-bisevibugavepa-razagukuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422631/normal_5fd91957a343d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411702/normal_5ffb8a69159cb.pdfIn PDF document text
    • https://vonosupaxeme.weebly.com/uploads/1/3/0/7/130740497/81869.pdfIn PDF document text
    • https://babunugigexi.weebly.com/uploads/1/3/4/5/134582988/nekufebagu-medipiwapeta-nujiwisinilenot-xokajon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486763/normal_6061eb915da87.pdfIn PDF document text
    • https://mebemawadaj.weebly.com/uploads/1/3/5/2/135295691/1012463.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/f9a47c3c-7795-43a0-a97c-0c2a5c7da9d4/fiwevexovutasuwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7074282-989f-4ffa-b531-61b54dbea6c2/rureremewukezuvovetiwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c527c51d-3d08-47d2-b348-f6d3b737da29/perobukidaza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94edeba6-3d8b-482c-9e29-f0b520047a0a/lusulugerefaxirofafizalox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c8feb54-3db7-4328-8fef-31ef7fbf3c9f/99948961672.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_off0000f2e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E1 5232 bytes
SHA-256: a5c2a0a61b38f041d4edb03cba0e4f76dfa96e2d20f4529968f5c52a52fc0e34
font_01_sfnt_off00010496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10496 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off00010d24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D24 11044 bytes
SHA-256: 7c1ccdad97a41bf4a4580fabb3e1057009147f7f7c79a47dd6a002a53cacfb39