Malicious PDF — malware analysis report

Static analysis result for SHA-256 322f74565fbb4ba1…

MALICIOUS

PDF

69.4 KB Created: 2020-12-27 06:28:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 3d252189d72fbee2bc11faad05f0f5b9 SHA-1: 7ca28e5cb071155e7c62e6b875ff1061eb76f42f SHA-256: 322f74565fbb4ba15ec2d239fc96985a3cd3f2c9a45db3eea8ef2d5ed6d9dc55
252 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by multiple heuristics, including flagging it as a redirector link and a link farm on disposable hosting. The ML classifier also strongly indicated maliciousness. The document contains numerous links to external sites, some of which are known malicious redirectors, suggesting an attempt to lead the user to phishing or malware-hosting pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gettraff.ru/strik?utm_term=sniper+shot+3d+hack In PDF document text
    • https://popetufuwude.weebly.com/uploads/1/3/1/4/131483025/naditetazomi.pdfIn PDF document text
    • https://sibakixode.weebly.com/uploads/1/3/2/8/132814768/6c71955787.pdfIn PDF document text
    • https://votawaxamudogop.weebly.com/uploads/1/3/4/4/134400347/0c703f94d.pdfIn PDF document text
    • https://difekubo.weebly.com/uploads/1/3/4/7/134714923/tokojowenesodid.pdfIn PDF document text
    • https://rudofodirofebas.weebly.com/uploads/1/3/0/7/130739781/mopasitifun_remonogi_ponutavulefo_jegiwesupi.pdfIn PDF document text
    • https://tedawubav.weebly.com/uploads/1/3/4/3/134376018/gofivu.pdfIn PDF document text
    • https://nelibijejukeli.weebly.com/uploads/1/3/1/4/131437261/rujib.pdfIn PDF document text
    • https://zolezuborejizo.weebly.com/uploads/1/3/4/4/134444688/natusosokirepudule.pdfIn PDF document text
    • https://woteginawewe.weebly.com/uploads/1/3/1/3/131379999/nizifagakamufufe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c5b2f57-9a05-411b-bb53-61a4021750f4/urban_drug_empire_mod_apk_premium.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a431f79e-eea7-4224-a9db-bd4e24902e85/notovivuzom.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD294 5460 bytes
SHA-256: 29d6403796732940800898f082228d13352b003e17c0112eb57fb04318ca39a5
font_01_sfnt_off0000e51b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE51B 11288 bytes
SHA-256: 32679903c1abc7e4d2256ef7c6bffb2c6e0eab5359d66871c1fa627a33d0f063

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