Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9cc119126ab0d20…

MALICIOUS

PDF

90.0 KB Created: 2021-03-23 05:57:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dde8f7695b5eb10d9981d0bca0725913 SHA-1: 58ac55295f245553f2ba9fc5720a8ee5c6f5d301 SHA-256: f9cc119126ab0d203e10e574e66365542dd09afe760238b216ab9e9c95ac588f
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a specific detection name indicating it's a phishing trojan. It contains an embedded URI pointing to 'golowaki.ru', which is likely the primary malicious destination. The document body, though heavily obfuscated, contains text related to 'green smoothies for weight loss pdf', suggesting a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://golowaki.ru/123?utm_term=green+smoothies+for+weight+loss+pdf
    • https://fuketuxe.weebly.com/uploads/1/3/4/4/134495293/katudepixij_wepesuga_nasan_bakanifunosip.pdf
    • http://rajulikarizamu.iblogger.org/53754161256.pdf
    • https://static.s123-cdn-static.com/uploads/4422377/normal_5ffd987490ebf.pdf
    • http://fobegoruf.iblogger.org/25093982429.pdf
    • https://cdn-cms.f-static.net/uploads/4475577/normal_5fd3508bbe658.pdf
    • https://cdn-cms.f-static.net/uploads/4469849/normal_6055294fd763a.pdf
    • https://misutinulil.weebly.com/uploads/1/3/1/4/131407711/3440cade0.pdf
    • https://cdn-cms.f-static.net/uploads/4489587/normal_60121e5f3b2ee.pdf
    • https://jovigazever.weebly.com/uploads/1/3/1/6/131637362/zetolut.pdf
    • https://cdn-cms.f-static.net/uploads/4384164/normal_5fd639341f34a.pdf
    • https://sixalusizefew.weebly.com/uploads/1/3/1/3/131378898/laberenisanaratifugi.pdf
    • https://cdn-cms.f-static.net/uploads/4406169/normal_5fd31ce2f3d03.pdf
    • http://vigufut.iblogger.org/scratch_1._4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://e0220c8c-c322-4c33-af83-7c5b0fe00b66.filesusr.com/ugd/a771bd_93e3cea951ec4352964836c86ca38e50.pdf?index=true
    • https://s3.amazonaws.com/vufuzewasi/chest_antithrombotic_guidelines_2018.pdf
    • http://goseletew.epizy.com/19820652987.pdf
    • https://s3.amazonaws.com/jewizopukuni/sword_of_the_berserk_guts_rage.pdf
    • https://dc58184e-bbba-402a-8e08-a55d552c8f3f.filesusr.com/ugd/0ebc1f_5c6993420a714180a6ab855e472ebb65.pdf?index=true
    • https://2cfcb734-ec62-4cd9-b61c-03d4762ad765.filesusr.com/ugd/a891c0_7e1b6d053eef4d8c810b7ee2ceeee2ad.pdf?index=true
    • https://s3.amazonaws.com/jepinebawo/bubble_answer_sheet_1-_100.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011fef.bin
f5f330ca1e20e78657622112a6030ccf63aa79deafe8251661b95e02336280aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FEF 5368 bytes
font_01_sfnt_off00013224.bin
3cf1a738dab90d21025286ecd0df106c8dae66bd11ea9b74f0e5669d1f787955
pdf-font-stream PDF embedded font (sfnt) at offset 0x13224 11664 bytes