Malicious PDF — malware analysis report

Static analysis result for SHA-256 8acfe27e90b26c30…

MALICIOUS

PDF

108.9 KB Created: 2021-04-07 18:22:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 952c0e55d83328fdf38b2afece7fb20e SHA-1: 957f2f3d60e4b1446b62d552d7a207824e8bf256 SHA-256: 8acfe27e90b26c30b1df1386682fa01303f84b7396e7cf98f6b509844e4469f1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

Heuristics 5

  • 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 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://midufefew.ru/wix?keyword=pcq+calls+cvs+reddit PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387582/normal_602ea37b39a4a.pdfIn PDF document text
    • http://digitalmicroteter.xyz/ropipodejitunprc5i.pdfIn PDF document text
    • https://wajirabipuxu.weebly.com/uploads/1/3/0/8/130874591/2406891.pdfIn PDF document text
    • http://pafowitowa.medianewsonline.com/8645583589.pdfIn PDF document text
    • http://otomail.business/kugejaguxigulz8wg.pdfIn PDF document text
    • https://cdn.sqhk.co/sidogorego/hhjaLT3/58856549329.pdfIn PDF document text
    • http://betizekaxu.getenjoyment.net/ruger_lcp_crimson_trace_pocket_holster.pdfIn PDF document text
    • http://worameruvejaka.mywebcommunity.org/99339453374.pdfIn PDF document text
    • https://damusabuweko.weebly.com/uploads/1/3/4/6/134609075/jirarijumirodaru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451356/normal_602d6e37c1b97.pdfIn PDF document text
    • http://cheatyou.site/ice_hockey_stick_tape_waxdtt19.pdfIn PDF document text
    • http://batmbatm.ru/1529962771866y0.pdfIn PDF document text
    • https://buvelixajotoneb.weebly.com/uploads/1/3/5/9/135982000/fisekigine.pdfIn PDF document text
    • http://natorg.space/vameloxanuzenebewyktkk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409248/normal_60407457bf89a.pdfIn PDF document text
    • https://cdn.sqhk.co/nulusezitelo/aig2WLA/79656792104.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://rofuvawitarul.atwebpages.com/14843344943.pdfIn PDF document text
    • http://zubiluwetij.myartsonline.com/kabazikuxu.pdfIn PDF document text
    • http://kedisijusa.onlinewebshop.net/81136816514.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013f27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F27 10220 bytes
SHA-256: ab2ceb58b1ffac34c5e38a9563855d9d5e279468f1804f3e49786192b436f461
font_01_sfnt_off0001601c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1601C 4692 bytes
SHA-256: eac1fa0c8bc2d33bd26aa4b9b53bbf5512d05b67def65e6bb2d458c53c06a31e
font_02_sfnt_off0001701a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1701A 11132 bytes
SHA-256: 43d0dd90ac0694ef6ed8d516bd65f88c1b2489e5ca30563f15fda04559c0f17c
font_03_sfnt_off00019602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19602 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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