Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce2cb363aa013289…

MALICIOUS

PDF

92.9 KB Created: 2021-03-03 20:54:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 0312e5c0bdc020b6c5727f2f60403957 SHA-1: 18e06fad2770564d9e7134c19b3889065933c656 SHA-256: ce2cb363aa0132895acd76c31dc5c0652d4727eda30f4e8c60e60aca330f981c
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and is flagged by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly indicates maliciousness. The document body, though partially corrupted, suggests a lure related to a 'digital photography complete course', which is used to mask the malicious intent of directing users to external URLs like https://jumiwimov.ru/strik. This pattern is consistent with phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jumiwimov.ru/strik?utm_term=digital+photography+complete+course+david+taylor PDF link annotation
    • https://cdn.sqhk.co/gepumenujeme/dicAfgj/sonic_boom_shattered_crystal_nintendo_3ds_game.pdfIn PDF document text
    • https://webegerux.weebly.com/uploads/1/3/4/7/134759049/zoluxisab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425784/normal_5ffbc401a1e43.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495551/normal_5feb854f1022c.pdfIn PDF document text
    • https://wuxorazaw.weebly.com/uploads/1/3/2/7/132712222/lasugebuba-pubidineg.pdfIn PDF document text
    • https://forupiwiwipugo.weebly.com/uploads/1/3/5/3/135349306/6497013.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473890/normal_5fe77cf4b5bc2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404488/normal_5fe2dfa0ba129.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/neporezofov/les_capitales_des_pays.pdfIn PDF document text
    • https://s3.amazonaws.com/jozaponi/tobelokata.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/ladki_aankh_mare_dj_remix_song.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/diagnosis_banding_bronkitis.pdfIn PDF document text
    • https://s3.amazonaws.com/kukazowox/61632119099.pdfIn PDF document text
    • http://fisuzes.epizy.com/types_of_figurative_language_worksheets_5th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/cisco_esa_best_practice_guide.pdfIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D5 8708 bytes
SHA-256: ca2dc7ec46f149813dadec02fa3671d7b09074ad07094c882c27903e0fade4a8
font_01_sfnt_off000106c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C3 5648 bytes
SHA-256: b3e884db535db8af85ab4e766633c29bb0226c5d1711bfb26760f01b57f78111
font_02_sfnt_off000119e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119E0 12076 bytes
SHA-256: b1466456d66a1662e029720633a983f5ce3a2772817fd65f8f0f3e1921cde3eb
font_03_sfnt_off00014182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14182 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e
font_04_sfnt_off000156ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156EE 3084 bytes
SHA-256: 16612709a3495e503003dc75958832730f9f004bef65632d943e771814e60955

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