Malicious PDF — malware analysis report

Static analysis result for SHA-256 0581ce5b85f0fd86…

MALICIOUS

PDF

79.2 KB Created: 2021-05-27 16:41:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4ca10c64e0bb71fac8836b68419cd7f SHA-1: aeef4da75eb3dbc939780d2a508f8064fa8f225a SHA-256: 0581ce5b85f0fd86893a4184c37e3343f2ffc7d314844f66fc3f167b015bcedf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains a significant number of external links, many pointing to Weebly-hosted PDFs, indicative of a link farm or SEO poisoning tactic. The primary URL, https://botokaw.ru/strik, is likely a phishing or malware distribution endpoint. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://botokaw.ru/strik?utm_term=monsta+x+jooheon+tipo+ideal
    • https://tuxatijofewimem.weebly.com/uploads/1/3/4/6/134686538/f4e7a1ab.pdf
    • https://kekipefawaro.weebly.com/uploads/1/3/4/5/134588225/f16b17a8352.pdf
    • https://sakifawabepufa.weebly.com/uploads/1/3/4/4/134466371/9b2aba8.pdf
    • https://dunebuka.weebly.com/uploads/1/3/2/6/132682868/jafujagulexad_xebolukaloga_livamonebewepij_vufufajokofode.pdf
    • https://nesefutuderixu.weebly.com/uploads/1/3/2/7/132740375/f03bea02.pdf
    • https://static.s123-cdn-static.com/uploads/4387709/normal_5fdef4b84686d.pdf
    • https://siwetoro.weebly.com/uploads/1/3/0/8/130814297/8088566.pdf
    • https://tatidadimu.weebly.com/uploads/1/3/5/3/135383915/9003085.pdf
    • https://cdn-cms.f-static.net/uploads/4460944/normal_606662c6529ca.pdf
    • https://xizovetezewo.weebly.com/uploads/1/3/2/8/132814166/furujape_vewowar_xikixa_xinamotu.pdf
    • https://fefodenajefive.weebly.com/uploads/1/3/1/4/131437461/piparoru-sipefazeromomi-nuzezosesap-tabalo.pdf
    • https://wapixetisabin.weebly.com/uploads/1/3/4/6/134685373/jufelen_gapoxobus.pdf
    • https://zutiwijutorezaz.weebly.com/uploads/1/3/4/3/134354078/6177092.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ca157471-2954-4375-ad01-9a214d57b262/43946741912.pdf
    • https://uploads.strikinglycdn.com/files/51f24626-5ee5-4234-b37d-5ea647028a76/diary_of_a_wimpy_kid_the_long_haul_full_moviedaily_motion.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3bb.bin
59e8ebaeb3cf190c53177f166837dc0822cad25cd580da9225d04a7002e9f764		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BB 5100 bytes
font_01_sfnt_off0000f51f.bin
d33d21edc8f5136db033a41b09d6dea7f7f0062a29e3903fb49e28bed774b222		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF51F 4440 bytes
font_02_sfnt_off000105b8.bin
be0c24dd660266ac9d87b7115c2eec146f8deeb2ab6a3bd244516291faf6edec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105B8 13224 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.