Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f05986cc91c4cbb…

MALICIOUS

PDF

76.8 KB Created: 2021-02-19 21:52:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c1f25e64b95def71f29afb1aee9d2640 SHA-1: 02bbaf9ae2dc1e5b8378e0ea7334753b3e6cbf30 SHA-256: 7f05986cc91c4cbbf55dcae50a00f64a453194d50a1cd5223c85aef6596e4a96
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO spamming tactic. The presence of a URL related to 'tap tap revenge 2 apk download' indicates a potential lure for users seeking game applications. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://baarspo.ru/wix?keyword=tap+tap+revenge+2+apk+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388163/normal_6016eb76b7182.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368495/normal_5fee8c3292ad0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388158/normal_5fe2d8162d333.pdfIn PDF document text
    • http://startbastar.online/amazon_fire_tv_4k_remote_replacementwkf1l.pdfIn PDF document text
    • http://titoto.xyz/proses_fermentasi_alkoholzhtq7.pdfIn PDF document text
    • http://drive4mclaneaustell.com/70624288019prpd5.pdfIn PDF document text
    • http://mesretly.xyz/jikolimemezejofilebekujthb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482190/normal_5ff57bee42a8d.pdfIn PDF document text
    • http://topfrag.rip/prepare_7_students_bookocygo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369316/normal_5fca85be8da39.pdfIn PDF document text
    • https://lufalejovi.weebly.com/uploads/1/3/1/3/131380058/volaxapizipo.pdfIn PDF document text
    • https://cdn.sqhk.co/vofonowul/egegfhf/war_galaxy_youtube.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447089/normal_6009b227a48a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377095/normal_601911fde64e7.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000f8b1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF8B1 24656 bytes
SHA-256: c3c6765b011b3c7f7f18781fb0867e75523c46868d9ea7684b287e40f9bf34a2
font_00_sfnt_off0000c35f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC35F 5248 bytes
SHA-256: 18ea8fa8319c966ba40b1b69063461789ccae8092ab62c240a49bfd53d438f39
font_01_sfnt_off0000d564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD564 10264 bytes
SHA-256: 3e6dc6bf650d9ee910d89db290bcc5329b70f6a95e3fd4cb5cfa9c83818592b7

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