Malicious PDF — malware analysis report

Static analysis result for SHA-256 af70a7fa9b23f3b3…

MALICIOUS

PDF

69.0 KB Created: 2021-01-17 07:48:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 74bbbd90abb221c1c008cc3eb1f05b11 SHA-1: 7f4af9e7e48ce0e7ec49a2137e783d9f3fda6c44 SHA-256: af70a7fa9b23f3b3b2e16ab615897ecc76d35ae443fa585d68aa3fc3c401ec2e
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, with one identified as a malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and ClamAV detection strongly indicate malicious intent. The document body is heavily obfuscated, but the presence of numerous external links suggests an attempt to lure users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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/123?utm_term=wanted+saturn+survivor+destiny+2+location In PDF document text
    • https://tedibijufu.weebly.com/uploads/1/3/4/6/134678634/69217636541047.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461481/normal_5fb468c156538.pdfIn PDF document text
    • https://lepovomika.weebly.com/uploads/1/3/4/7/134701686/renewasamukavafu.pdfIn PDF document text
    • https://wakejowedab.weebly.com/uploads/1/3/4/5/134599651/4017629.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365582/normal_5f91c78754a10.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/zisulamisozoto/83084821272.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/32474032548.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/73902396277.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/naruto_shippuden_ultimate_storm_3_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/capturing_marketing_insights.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/pagoxabeboku.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/movesolalusanewibabora.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_off0000d22e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD22E 5240 bytes
SHA-256: 9c19e35141a56c8cfe885882f7c63667bd72c640b0e430ee5162c5feffc865ea
font_01_sfnt_off0000e425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE425 10388 bytes
SHA-256: 7e76f19f88e94602a8ece9eec017f2ef29ab0b5db8b816163b7ef4cd93246c93

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