Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1216aee67af90d2…

MALICIOUS

PDF

82.2 KB Created: 2021-06-01 07:04:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8158462f831164116d64b3b4bcdd1946 SHA-1: 8d205057d68bf378da55c924528555e251191ad7 SHA-256: f1216aee67af90d2d088a94801daccb7628ed32f0ea2191faa11dcaabc1552eb
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting it is part of a link farm designed to drive traffic to potentially malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically classified as phishing. The embedded URLs and the document body, though heavily obfuscated, point towards a lure related to 'Raze 3 unblocked games'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://huntic.ru/pbw?utm_term=raze+3+unblocked+games+weebly
    • https://cdn-cms.f-static.net/uploads/4380876/normal_600c966c550fe.pdf
    • https://cdn-cms.f-static.net/uploads/4382778/normal_606143038ed83.pdf
    • https://cdn-cms.f-static.net/uploads/4373778/normal_606e98f27e8ac.pdf
    • https://static.s123-cdn-static.com/uploads/4404723/normal_5fe2558702940.pdf
    • https://cdn-cms.f-static.net/uploads/4483082/normal_602554feaf56d.pdf
    • https://cdn-cms.f-static.net/uploads/4463812/normal_60555479eb416.pdf
    • https://cdn-cms.f-static.net/uploads/4493550/normal_601d4deb22f56.pdf
    • https://likuwiwekadu.weebly.com/uploads/1/3/1/8/131857000/4967186.pdf
    • https://fopalese.weebly.com/uploads/1/3/5/3/135349797/744875b864a77c.pdf
    • https://mubasaji.weebly.com/uploads/1/3/4/8/134846322/591158.pdf
    • https://static.s123-cdn-static.com/uploads/4451033/normal_5fe18e573a716.pdf
    • https://static.s123-cdn-static.com/uploads/4382952/normal_5fe55911e3730.pdf
    • https://static.s123-cdn-static.com/uploads/4389821/normal_5ff27452a95e5.pdf
    • https://doxediseweroz.weebly.com/uploads/1/3/4/6/134634010/fajir.pdf
    • https://lubumona.weebly.com/uploads/1/3/4/6/134648672/f0df4fb1416.pdf
    • https://xilorufanil.weebly.com/uploads/1/3/0/7/130739938/sevewemozof.pdf
    • https://cdn-cms.f-static.net/uploads/4455876/normal_600e4b715b7aa.pdf
    • https://cdn-cms.f-static.net/uploads/4420602/normal_60360f5ebeaf4.pdf
    • https://static.s123-cdn-static.com/uploads/4470532/normal_60046e2986560.pdf
    • https://cdn-cms.f-static.net/uploads/4487208/normal_603e796ca7fec.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • http://bofamawetodo.pbworks.com/w/file/fetch/144443724/52759239154.pdf
    • http://lekipirunezi.pbworks.com/w/file/fetch/144413619/33539284728.pdf
    • http://banusiv.pbworks.com/w/file/fetch/144441336/pivodotomadowatozobozotor.pdf
    • http://giwupiraride.pbworks.com/w/file/fetch/144445677/anti-tifico_o_de_salmonella_positivo_1_80.pdf
    • http://nefusim.pbworks.com/w/file/fetch/144443811/vimodoke.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eaca.bin
560b8ab2fc1284a45634aeb8a9b9a82a2b49f915a1eefa4b7e401b790f37a447		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEACA 3032 bytes
font_01_sfnt_off0000f5a0.bin
570f05e84267a12db2984495e9406c06590bf40d0c295f5a357209f4f47bb88c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A0 5780 bytes
font_02_sfnt_off00010968.bin
ff455a46baaf6bdd17c0e24c1d9c127ad6e4299955d32a9557a39af9fe49d37a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10968 11372 bytes
font_03_sfnt_off0001308f.bin
a8078c261f2e8b4a51fcef2542c7da04afe572d6dcf61cf29d0eba091265fcc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1308F 2380 bytes

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