Malicious PDF — malware analysis report

Static analysis result for SHA-256 be25983a7ff429b7…

MALICIOUS

PDF

84.6 KB Created: 2021-03-07 03:46:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: adf721399fdc4632775d5ab6e95608d7 SHA-1: 112b6afd4d4f4b97278b9879856f605781afbc66 SHA-256: be25983a7ff429b766da80ea13a63e96f6da3fc7b440329a33107947647017da
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/strik'. The ML classifier also flagged this PDF with high confidence. While no scripts were extracted, the presence of embedded URLs and the redirector link strongly suggest a phishing or malware distribution attempt. The document body is heavily obfuscated and unreadable, providing no further context.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/strik?utm_term=the+unwanteds+characters In PDF document text
    • https://static.s123-cdn-static.com/uploads/4474218/normal_5fcff2aac6ec5.pdfIn PDF document text
    • http://lemakomude.sportsontheweb.net/pelaxoxegu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369908/normal_604424a287d94.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407086/normal_5fe59b80dd56d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366034/normal_6008b7a135dce.pdfIn PDF document text
    • http://gojavodevagajuw.mygamesonline.org/acts_of_paul_and_thecla.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374700/normal_5fea254496d87.pdfIn PDF document text
    • http://fogafiv.mypressonline.com/how_to_use_a_lean_mean_fat_grilling_machine.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454432/normal_6023f01583a6f.pdfIn PDF document text
    • http://pogawubujogeje.mypressonline.com/vewuxelafer.pdfIn PDF document text
    • http://tezuveripoxub.mypressonline.com/big_green_egg_turkey_breast_brine.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448115/normal_5feaffce3213a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367944/normal_5fe0760642f23.pdfIn PDF document text
    • http://vozuzutiwajuzip.getenjoyment.net/31052629192.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rabatelekovufar.myartsonline.com/50800598779.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/mejusawatoko.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/tyt_9000d_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/retiku.pdfIn PDF document text
    • http://baletax.onlinewebshop.net/graco_nautilus_snuglock_lx_3-in-1_harness_booster_2018_-_auden.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EDE 5036 bytes
SHA-256: 15bcae2857cdc63c2987293ac2a29a8075a86e55a63089a7eaaf9d6e654c3b99
font_01_sfnt_off00012008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12008 10972 bytes
SHA-256: ab9827f3408f1354ac3293a526e6a64c084914efa3a8b5ef7880f4cd5b5e025d

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