Malicious PDF — malware analysis report

Static analysis result for SHA-256 7440f9503b713794…

MALICIOUS

PDF

102.7 KB Created: 2021-05-23 21:10:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 51741e4713964c41bed7c838fbc5bee2 SHA-1: 508c4eafbea6248f9ab9b49f9a42a91959ed87dd SHA-256: 7440f9503b713794dc90d97ffe0b05dd5a26c639fae21039c5447f93af8ba115
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a clipboard-command (paste-and-run) lure. 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://resalured.ru/strik?utm_term=how+to+check+list+of+files+in+command+prompt PDF link annotation
    • https://vipelunova.weebly.com/uploads/1/3/2/7/132712034/ginezipepapevevib.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459629/normal_5fde162e09ba7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470685/normal_5fe2bd7274b5e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485016/normal_5fe0b0ac17b1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403540/normal_6021a9ab84aeb.pdfIn PDF document text
    • https://gisijenoxumo.weebly.com/uploads/1/3/1/4/131437849/7304466.pdfIn PDF document text
    • https://mufalugibesenu.weebly.com/uploads/1/3/1/4/131453255/sejagogaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421778/normal_605449fcd7d1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387232/normal_6011a16239c34.pdfIn PDF document text
    • https://nuvuxupu.weebly.com/uploads/1/3/4/5/134507381/3f25e3ff9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500877/normal_6037282dadb38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417046/normal_600c701359b1f.pdfIn PDF document text
    • https://roxejozojone.weebly.com/uploads/1/3/0/9/130969259/mozewu_towusalifet_pojob.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484107/normal_5fded7000c508.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365586/normal_5ffd3b0396bcd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/spider_man_noir_comics_in_order.pdfIn PDF document text
    • https://s3.amazonaws.com/lemerisinivum/cartoon_network_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/kerunaganomamorapawusalo.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/cardiac_science_powerheart_aed_g3_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/how_to_study_for_ochem_exam.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_off00015152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15152 5512 bytes
SHA-256: f0de22cc0f467f53d0a0661e8b692c2c59b9052c0eb9adf1f1c01770018263b8
font_01_sfnt_off000163f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163F9 11984 bytes
SHA-256: 5dd9071f752021fd7d0c74e4603fb0841215691843d3feec02135a0736133bde

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