Malicious PDF — malware analysis report

Static analysis result for SHA-256 80de77c2390d1fc7…

MALICIOUS

PDF

77.5 KB Created: 2021-03-16 18:03:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: f09f9ab15ea391f33e06c4b5a2a75573 SHA-1: 047fb6795054b790b9ef4b667da5a9b3b27e6c7c SHA-256: 80de77c2390d1fc75a3f0974fdfa9f2585bac4a109ff7b3fc6304b64665e63c6
176 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a primary URL pointing to a suspicious domain that appears to be part of an SEO link farm. The 'SE_CALLBACK_LURE' heuristic suggests a phishing or scam pretext, and the ML classifier strongly indicates maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • 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://resalured.ru/wix?keyword=buncombe+county+outstanding+warrants PDF link annotation
    • https://cdn.sqhk.co/xujurovemu/jizijSR/68272982644.pdfIn PDF document text
    • https://cdn.sqhk.co/pasepizut/wKv3ujd/rebifenizapimu.pdfIn PDF document text
    • https://cdn.sqhk.co/loxepafigav/hj3jfGY/pivemixuvirorogutaxan.pdfIn PDF document text
    • https://cdn.sqhk.co/wujakegu/G2jejad/38351380297.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/caresource_of_georgia_provider_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/96141369060.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/instagram_old_version_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54301206-f78f-4f67-9d69-94e92a3f9c2e/17970881025.pdfIn PDF document text
    • https://de461234-8179-4892-b46d-67dc01ae00af.filesusr.com/ugd/69bbc5_1a98f4d7875245bfbc8bf88676c37fb2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c191b23-8fc3-4464-afff-ea0d3fc9a9c5/physics_part_2_by_resnick_and_halliday_download.pdfIn PDF document text
    • https://8c805f22-5240-4a8e-9b4d-8499607ff1fc.filesusr.com/ugd/76156b_c7d02b9f0d294526bc2ba36c348e738d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/walomurawidilir.pdfIn PDF document text
    • https://c6111751-42b6-464f-a8b1-832d492ff999.filesusr.com/ugd/3d0627_9d477bf2b2a1474a8afb6817f72a9a11.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/unit_four_mechanisms_of_evolution_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bb11935-8d19-47ba-b890-83a9bf151209/xoliritavowo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02907910-a193-49c4-9439-2041b96a920e/29049956024.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/mh_cet_law_2019_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/canon_lide_210_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/gujunebado.pdfIn PDF document text
    • https://85fc0914-20e3-4f1c-be8c-de7e6f89f47e.filesusr.com/ugd/a44510_9a2150910a954c1295fcbd83541fb088.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/20100923361.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/zowojuzaburonunem.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_off0000ee28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE28 5612 bytes
SHA-256: 307b1a5b0af636d70fb6396058d763cddac68b068aec8b33c4daf0528c67d4b3
font_01_sfnt_off00010138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10138 11608 bytes
SHA-256: 0bb64191ac99aa21af07f21e19877e59044d671d6cad2e8daa47d6466716aa1e

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