Malicious PDF — malware analysis report

Static analysis result for SHA-256 89a747b6beb2a54d…

MALICIOUS

PDF

79.6 KB Created: 2021-03-24 04:30:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 3a1a9e80c1e805c2d3af6a920a422949 SHA-1: 99a57682db7267d86df204a4bf42881db84124ec SHA-256: 89a747b6beb2a54dc5c663be66f5dfe5ba1e7a8f81d770541a7f29b35e06114f
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of external links, indicating it is likely part of a link farm designed to drive traffic or host phishing content. The document body, though truncated and obfuscated, contains text related to 'Navy seals vs zombies trailer', suggesting a lure to attract user clicks to the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://golowaki.ru/strik?utm_term=navy+seals+vs+zombies+trailer PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465133/normal_6046b9a156662.pdfIn PDF document text
    • https://cdn.sqhk.co/tevunufoba/hxTjgjf/monopoly_bingo_cheat_codes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481839/normal_601ecb6dca430.pdfIn PDF document text
    • https://cdn.sqhk.co/doparibi/igejajb/84752299936.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401697/normal_604dde59dffd9.pdfIn PDF document text
    • http://policyhelpcenter.com/getefadowefq20u9.pdfIn PDF document text
    • https://bowixasexagat.weebly.com/uploads/1/3/4/0/134041419/87ab90b56dad3ce.pdfIn PDF document text
    • https://cdn.sqhk.co/wiwevini/igdghYB/bio_data_format_for_job_word_file.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490523/normal_602aec4bdf496.pdfIn PDF document text
    • http://sovuradema.medianewsonline.com/fs_i6x_range.pdfIn PDF document text
    • https://nesibebinirudeb.weebly.com/uploads/1/3/5/3/135311353/7825050.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382972/normal_601a7d97e4367.pdfIn PDF document text
    • https://cdn.sqhk.co/gabadifofibo/7jqidII/4542484575.pdfIn PDF document text
    • http://mastera-saydinga.ru/mr_majnu_bengali_subtitlestyrna.pdfIn PDF document text
    • http://barberking.best/what_is_the_plural_of_moose_and_deer0o3x1.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzivogawa/7kgfXjh/65144651818.pdfIn PDF document text
    • http://xuxikurov.mygamesonline.org/2015_jeep_grand_cherokee_service_4wd_system.pdfIn PDF document text
    • https://pefuxagofir.weebly.com/uploads/1/3/4/3/134359429/gixusirekikem.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/6d094658-1c5a-4c92-bd28-49c11540832d/tree_of_life_nursery_availability.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c706558-95f3-44ac-a927-196b72609811/who_makes_bostitch_nailers.pdfIn PDF document text
    • http://zakefuki.myartsonline.com/motivational_interviewing_define.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88a4bb65-1161-4da1-81c7-54de5c68ca5f/xaxanezevifu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6db56a4-05da-4c81-9cf7-c27af106d30b/first_aid_usmle_books.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_off0000f9b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B7 5152 bytes
SHA-256: 93ed4297c866ca076560a8901d6f14fbd162c62de10f6957e581a79b7dbdf173
font_01_sfnt_off00010b3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B3A 10960 bytes
SHA-256: 578b0f6b3ac2eac383f1af0511f2f900a825effb5e82fb36348fd6694bba4b63