Malicious PDF — malware analysis report

Static analysis result for SHA-256 723a8b3e1cdb2fe7…

MALICIOUS

PDF

73.6 KB Created: 2020-11-19 05:55:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 04efb05125582eea7accac9955ae553e SHA-1: 95102db277537da23c919307fd43ca6433d76f71 SHA-256: 723a8b3e1cdb2fe7af4846a72923ac514263a91ae3493898505a8a86f2624b3b
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for redirecting to known malicious infrastructure and a PDF link farm. The ML classifier also assigned a high probability of maliciousness. The embedded URLs suggest an attempt to lure users to malicious sites, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself contains malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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.
  • 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://gettraff.ru/123?utm_term=halfway+down+the+stairs+chords In PDF document text
    • https://cdn-cms.f-static.net/uploads/4373782/normal_5f928d6210d69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485014/normal_5fb00fb1ed2e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380082/normal_5fa2ee05cbe65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404990/normal_5faf3ca545080.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421462/normal_5f968b66dfc5b.pdfIn PDF document text
    • https://farigelud.weebly.com/uploads/1/3/4/2/134266281/tovuji_texedukumuxukak_wogagawedibebe_borukodapif.pdfIn PDF document text
    • https://kenilajapa.weebly.com/uploads/1/3/1/0/131069910/luzukugilotiwomexek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444358/normal_5fadcfd1ec559.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454286/normal_5fa0db77a851e.pdfIn PDF document text
    • https://xawiwewediwo.weebly.com/uploads/1/3/4/0/134017039/2dea13b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488822/normal_5fa8c562420ab.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://uploads.strikinglycdn.com/files/8aa510b4-a395-4a18-abde-b86b4f97c07f/39823526521.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d65e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD65E 5052 bytes
SHA-256: 704d4863137c0746e4196cdae0e8e81723e0461431518e76385b6754955dc454
font_01_sfnt_off0000e795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE795 10544 bytes
SHA-256: 7c0fe501e76fabf2eb6c637a6edf821a61edf260d75b253f3c434e238284fbcc
font_02_sfnt_off00010b6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B6F 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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