Malicious PDF — malware analysis report

Static analysis result for SHA-256 113f1122e16d7a7e…

MALICIOUS

PDF

75.8 KB Created: 2021-05-01 13:27:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 17d730239234df00311700c75b85e704 SHA-1: 1c94173b59f8387cc6a8933897c1d6d502746cca SHA-256: 113f1122e16d7a7e1fbc5dd7e30b74356701cd0863df70adbe6ad514b4449d11
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://gimoguvi.ru/strik?utm_term=sullair+375+compressor+troubleshooting PDF link annotation
    • https://pabarasoziraw.weebly.com/uploads/1/3/5/3/135324669/febijidoziseve.pdfIn PDF document text
    • http://prizyivnik.ru/what_is_the_purpose_of_lawyer_to_give_speechy5wix.pdfIn PDF document text
    • http://boevoenlp.com/iraga_iraga_dj_mix_audio_songavz23.pdfIn PDF document text
    • https://wapixetisabin.weebly.com/uploads/1/3/4/6/134685373/zoviruwanefopav_tuburifata.pdfIn PDF document text
    • https://cdn.sqhk.co/daxerarugak/ixEhf5N/kikulimuzoli.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480904/normal_6042fa4675394.pdfIn PDF document text
    • https://cdn.sqhk.co/filodomazora/6jalPgi/29220764969.pdfIn PDF document text
    • https://cdn.sqhk.co/jolodovi/hbgcPsJ/othello_walmart_pharmacy_phone_number.pdfIn PDF document text
    • https://fetedujas.weebly.com/uploads/1/3/0/7/130776810/98964b4cc09.pdfIn PDF document text
    • https://cdn.sqhk.co/semiwewedazi/REjeXjj/ravax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392871/normal_5fd1fb00ac545.pdfIn PDF document text
    • https://lufowatevumidoj.weebly.com/uploads/1/3/4/7/134704320/df50f516.pdfIn PDF document text
    • http://tlgfree.xyz/12926470758lkiv5.pdfIn PDF document text
    • https://vuxuminitemup.weebly.com/uploads/1/3/0/8/130874085/8803034.pdfIn PDF document text
    • https://cdn.sqhk.co/veletafi/neGighc/57009651396.pdfIn PDF document text
    • https://bemakidej.weebly.com/uploads/1/3/0/7/130739127/96329c5.pdfIn PDF document text
    • http://artrosil.xyz/611875410198l2v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456387/normal_6061fdb423d8e.pdfIn PDF document text
    • https://xupemapimosow.weebly.com/uploads/1/3/0/7/130776757/487b872536426b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487194/normal_60280244c37bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485714/normal_5fde52c9ce1b2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000eaa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA9 5956 bytes
SHA-256: 2665c7fff8d944aece166af823f2b895983173f666f09b111829333f6a03749c
font_01_sfnt_off0000fec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC7 10340 bytes
SHA-256: 83f6bb7c6e9fd3ad4139a8d74f5f30be2d3b7ac1ed1d705873b0c114826cb42f

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