Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a75a0d6f2d88ae6…

MALICIOUS

PDF

73.2 KB Created: 2021-01-31 05:12:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e505de3177cd10c80b5c5010a7f3f08 SHA-1: df3f5e9ce7dab97e8ad21ed48723d22037bb78d4 SHA-256: 3a75a0d6f2d88ae67424caf786f5ff6a12fde4b83c97c22a0273e8774e2086ba
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as a phishing trojan. The file contains a large number of external links, many pointing to PDF files hosted on various domains, suggesting a link farm or redirection scheme. The document body, though heavily obfuscated, contains references to popular search terms like 'Plants vs zombies peashooter airpods', indicating a lure to attract users. The presence of embedded JavaScript, though not directly analyzed for specific actions, is a common vector for malicious PDF exploitation.

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://bologen.ru/123?utm_term=plants+vs+zombies+peashooter+airpods
    • https://cdn-cms.f-static.net/uploads/4486521/normal_6014cee4bd76f.pdf
    • https://benipotuwazel.weebly.com/uploads/1/3/4/4/134445242/bixaj.pdf
    • https://jabasamivesapev.weebly.com/uploads/1/3/4/0/134041177/forosibixadina_gorujujadobasi_fupej.pdf
    • https://kakifiku.weebly.com/uploads/1/3/5/3/135347754/5803248.pdf
    • https://keduwiwisa.weebly.com/uploads/1/3/4/4/134486116/aa05e2d55.pdf
    • https://jeludumekidi.weebly.com/uploads/1/3/2/7/132740852/2888221.pdf
    • https://static.s123-cdn-static.com/uploads/4449777/normal_5fccfb2790d0a.pdf
    • https://setabuzi.weebly.com/uploads/1/3/0/7/130775645/86545d3b6b8.pdf
    • https://luzatewuxajexi.weebly.com/uploads/1/3/4/2/134265782/xegim.pdf
    • https://cdn.sqhk.co/mepowokugo/iakhfLt/healing_crystals_guide.pdf
    • https://cdn-cms.f-static.net/uploads/4495050/normal_600c48a60c0e8.pdf
    • https://nudopimiga.weebly.com/uploads/1/3/1/0/131070212/087716af42fb.pdf
    • https://cdn.sqhk.co/juxerawabuf/Uid9gf9/gibenufogab.pdf
    • https://cdn-cms.f-static.net/uploads/4469350/normal_5fd7fa094afc7.pdf
    • https://cdn-cms.f-static.net/uploads/4409604/normal_5fe9ba7aba1e1.pdf
    • https://cdn.sqhk.co/kupawusel/jenADjh/wegovadajusotino.pdf
    • https://cdn-cms.f-static.net/uploads/4480581/normal_5fd988eac344d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • 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_off0000d371.bin
2efcef02b2c13dc218932932f289ec0619721b255d1479401b51e89d964f1e7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD371 5236 bytes
font_01_sfnt_off0000e50c.bin
28835df087b984d650056ac85374f52bb8db44c6a1e147fd82fe2268bd4789e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE50C 10768 bytes
font_02_sfnt_off00010982.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10982 4324 bytes

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