Malicious PDF — malware analysis report

Static analysis result for SHA-256 10c848a288a9d213…

MALICIOUS

PDF

79.1 KB Created: 2021-02-23 16:49:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6cd1586ddf31d4309ea81b597652276a SHA-1: 4c8fc31d74a857ba04ac0d1aa3d415834c62923f SHA-256: 10c848a288a9d213e4c78cc72666f9642a457e7728a99db6909007007b9a0ea6
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 0.9998

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://jottigo.ru/strik?utm_term=the+spectacular+now+movie+2013 PDF link annotation
    • https://xuzipitazejaj.weebly.com/uploads/1/3/4/7/134722028/6696315.pdfIn PDF document text
    • https://zefijevizo.weebly.com/uploads/1/3/2/3/132302816/7d528b0bff1ee.pdfIn PDF document text
    • http://yandex-delivery.cc/vandhargal_vendrargal_book_freenny1v.pdfIn PDF document text
    • https://cdn.sqhk.co/nakijalufiw/ZhiUTgd/67951968671.pdfIn PDF document text
    • https://rigabobavotul.weebly.com/uploads/1/3/1/8/131856161/cf1ea2564cb87.pdfIn PDF document text
    • https://cdn.sqhk.co/vomawoko/Zdjieha/eagles_greatest_hits_vinyl_ebay.pdfIn PDF document text
    • https://tujowijide.weebly.com/uploads/1/3/0/9/130969571/1975615.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375690/normal_6032c6c274406.pdfIn PDF document text
    • https://rajevolid.weebly.com/uploads/1/3/0/8/130813967/kiziwoligas.pdfIn PDF document text
    • https://tofukoluto.weebly.com/uploads/1/3/0/7/130775982/6382269.pdfIn PDF document text
    • http://shortsomfj.space/bapuwagotua6xi7.pdfIn PDF document text
    • https://cdn.sqhk.co/fakosopalo/1ibTibY/auto_clicker_no_download_needed.pdfIn PDF document text
    • https://gopoxigubujazu.weebly.com/uploads/1/3/0/9/130969754/dc0ffb6f7837.pdfIn PDF document text
    • https://cdn.sqhk.co/rewakevutel/WXPSGgg/1016087503.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411696/normal_60036b6b2947f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451348/normal_601a29b37feb9.pdfIn PDF document text
    • https://cdn.sqhk.co/vetelojid/UgigjiU/wubovufubibogefure.pdfIn PDF document text
    • https://cdn.sqhk.co/baxotonad/94jdiuu/zajidopaj.pdfIn PDF document text
    • http://eeuuurrrrr.space/angular_formgroup_array_examplenax4n.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

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_off0000f52f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF52F 5764 bytes
SHA-256: 8c6682093cbd50cb65e0fd9ba97f6ef37a451c8833399b90a00b42e28f81cc3c
font_01_sfnt_off000108c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C1 11212 bytes
SHA-256: cf0d6c00370c551a16376771025760d3e485225236e33fd0d85f9fe5fa251155

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