Malicious PDF — malware analysis report

Static analysis result for SHA-256 66018e0ef162432b…

MALICIOUS

PDF

76.8 KB Created: 2021-03-23 23:05:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: beb06cbbe6265a0fe7dc2d6d378f0b49 SHA-1: fac0a98bfa466c28e2141bb6592ca7e94c740787 SHA-256: 66018e0ef162432b2f6c25a64b624a60b525c20e23605c85a7d19b24dc9ee182
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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. 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 0.9997

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://xajibur.ru/123?utm_term=sheet+pile+bulkhead+wall PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4458826/normal_5fe9e09da5911.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368748/normal_600f02f10e053.pdfIn PDF document text
    • https://cdn.sqhk.co/tatidukigag/pjbhgif/88238689727.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481675/normal_605053f676ac3.pdfIn PDF document text
    • https://cdn.sqhk.co/bamikalagov/agjL7mC/zero_gunner_2_classic.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373243/normal_5fe8908527d59.pdfIn PDF document text
    • http://fuxokubatasiju.22web.org/50398121060.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478378/normal_60146bdd49238.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/hhjdhid/43068504625.pdfIn PDF document text
    • http://kifojex.22web.org/goxirewipoporaligabagewe.pdfIn PDF document text
    • http://pojesuwemi.iblogger.org/the_answer_to_everything_song_wiki.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://de461234-8179-4892-b46d-67dc01ae00af.filesusr.com/ugd/69bbc5_3f6660aaf2354b4d8e38cda3de91d4cf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sevoga/lewes_delaware_surf_fishing_report.pdfIn PDF document text
    • https://cf268418-7549-4780-9cff-e39e61b5276c.filesusr.com/ugd/0b1cf2_a0c3cb31f2764a0c9132d0fadbe72d1d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/pubolapamowevigebedowusaz.pdfIn PDF document text
    • http://fikikozazilut.rf.gd/kabumuvugowebavaj.pdfIn PDF document text
    • https://689a2394-1721-4ce0-b6f7-af9f1dc0d621.filesusr.com/ugd/0f5b72_a93aef5d306b4a6f82f41479f92e40b3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/como_saber_si_una_persona_te_miente_por_telefono.pdfIn PDF document text
    • https://a208a2de-cee2-48c2-86e3-c620a022946d.filesusr.com/ugd/dda32d_0e2f192a6ebd4903b2696dbff0145d0a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/xisupujawi.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/77675643054.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f00a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF00A 5172 bytes
SHA-256: 85148c709f1a32533e4d0cb552ef142bd58b4c19686a73964b7cb017a8509623
font_01_sfnt_off000101b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B2 10748 bytes
SHA-256: 97458e572ca6f9875c494811be3d469583f78d462aab73efc02ef8ea98b8627d

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