Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2ef653b3b8a8ecd…

MALICIOUS

PDF

74.2 KB Created: 2021-03-20 00:50:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: aeb9191366f7074c9eac1909afa66a28 SHA-1: 241b49af3e6250b188d2e3b6eb4036c2457762c5 SHA-256: e2ef653b3b8a8ecdc8776376496cc07d9c2182f032d2c0a9a14947932f1c2603
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many pointing to disposable hosting, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or SEO manipulation scheme, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 6

  • 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 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.
  • 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://golowaki.ru/strik?utm_term=heat+n+glo+remote+pairing PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370302/normal_600aa6b3031a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487631/normal_602e0bc557173.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453563/normal_5fca90a47feb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405903/normal_603c6585cae7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371543/normal_601063cc1d409.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482631/normal_5fed57f196168.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408981/normal_6046318583b91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415073/normal_602b37e525128.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410717/normal_6004da61037a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415073/normal_6016fda36ddc0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384310/normal_5fd7297d2cb01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412909/normal_5fe64b7c0a450.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501374/normal_60269401be9b9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413112/normal_5feaf971962b5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://9e1e9198-0fe7-4103-8084-fdcc6befb8d5.filesusr.com/ugd/2f7815_8e6b4582ca674bd0b13982d31fccd003.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fixararololu/advanced_english_words_with_meaning.pdfIn PDF document text
    • https://eaa62ee9-779c-4a2d-9f50-6c66b019a99c.filesusr.com/ugd/1cc777_704a5ed8292e4e0b827ff909c200cede.pdf?index=trueIn PDF document text
    • https://73c25812-7308-4b32-b985-10e2a25710ca.filesusr.com/ugd/5b604d_4ce2796cf3e1443d9928410440bd7fec.pdf?index=trueIn PDF document text
    • https://451cdc1f-766e-44a1-8a9d-f9db2ecad5ed.filesusr.com/ugd/0f0d48_533cf35576964c1883a64977b39a4732.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jexijer/logo_branding_mockup_psd_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/2_filters_in_one_excel_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/20155008825.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/hacksaw_ridge_english_movie_480p.pdfIn PDF document text
    • https://99470c7d-c692-4648-a7b8-36ea19db2883.filesusr.com/ugd/ab059d_299189fec7584a3e84bc0e4adbc39796.pdf?index=trueIn 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD788 4712 bytes
SHA-256: 97d4eaf3618dddd80aabed0675466cafd1ab72bec0374a7b1ff41b1bb6f5354a
font_01_sfnt_off0000e765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE765 11028 bytes
SHA-256: 1a846c58f1ede2a8b884adcc1f0a05babce0d411e88ccaee5e9e53eade8c8139
font_02_sfnt_off00010caf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CAF 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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