Malicious PDF — malware analysis report

Static analysis result for SHA-256 cca6b8db1c373a12…

MALICIOUS

PDF

76.4 KB Created: 2021-03-04 12:03:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 7ee56619df00aa8014ad1dd08419b6d4 SHA-1: d2a83b76e13752642875a1f84911cc32e6504a2a SHA-256: cca6b8db1c373a1200cc79ddc8a858ae6348d58bdd1ef3aee39d01cac6bf607b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, including one pointing to 'xajibur.ru', suggesting a link farm or redirection to malicious content. The presence of multiple PDF links, such as 'murdergame_portable_hack_money.pdf', indicates an attempt to distribute further malware or phishing content. The document body, though heavily obfuscated, appears to be a lure related to 'Anatomy and physiology coloring workbook answers'.

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
  • 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://xajibur.ru/123?utm_term=anatomy+and+physiology+coloring+workbook+answers PDF link annotation
    • https://cdn.sqhk.co/sobetevod/ihhbSS7/murdergame_portable_hack_money.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498842/normal_5ff42744530b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409609/normal_6020d07f002a0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421781/normal_5fcb8d78a1a78.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426953/normal_5fce898e25869.pdfIn PDF document text
    • https://cdn.sqhk.co/tumowara/icrKA03/nba_2k20_pc_download_game.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465389/normal_601f855ac8fbd.pdfIn PDF document text
    • https://duvozeja.weebly.com/uploads/1/3/0/7/130739152/1375950.pdfIn PDF document text
    • https://garowenin.weebly.com/uploads/1/3/4/6/134662298/radadenebarinenefava.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468563/normal_601ae1d061dcd.pdfIn PDF document text
    • https://cdn.sqhk.co/mulepava/hcugfcb/the_knife_one_hit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501028/normal_603b431644a8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485710/normal_6034924688c0a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414678/normal_5ff9ed9c1d137.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445868/normal_60407d490f87a.pdfIn PDF document text
    • https://zefokivovemajo.weebly.com/uploads/1/3/0/8/130874141/a13412.pdfIn PDF document text
    • https://kiriwalukejogof.weebly.com/uploads/1/3/4/3/134310578/338840.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465564/normal_5fd30a0cca067.pdfIn PDF document text
    • https://cdn.sqhk.co/sobupepokor/gBasjjr/woxavumot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384167/normal_6016c3eb5943d.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://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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C1 5664 bytes
SHA-256: 8fcb39c17d344e0dc45e4f3994935ecbb15e09fa17fd8216d76ab2eba1ff4230
font_01_sfnt_off0000f3e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E3 10160 bytes
SHA-256: 456e58563273e45941cb9631601b377955f4498c6e16c1cd781a30feb4191d53
font_02_sfnt_off0001161a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1161A 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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