Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f394c77158de01f…

MALICIOUS

PDF

79.4 KB Created: 2021-03-06 13:42:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: dc9cec676445ea8fbcf84f76f773793f SHA-1: 0378543fb07b7dbdf1b7c99b37a7f541a0960c2a SHA-256: 2f394c77158de01ff6e6d37bdefb3ba71a705107f5d5e8896d90b72d8f2fbf65
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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.
  • 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/wix?keyword=rabbit+proof+fence+worksheet+esl In PDF document text
    • https://dutegonuguval.weebly.com/uploads/1/3/4/3/134310875/nodezuxasiw-kudolubebexim-dokejezeg.pdfIn PDF document text
    • https://sujarazigis.weebly.com/uploads/1/3/0/8/130813042/5910766.pdfIn PDF document text
    • https://turazuxutanuv.weebly.com/uploads/1/3/1/6/131606798/sepurak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386076/normal_6018858ed7a15.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4529024/normal_5fe16ad92f731.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401976/normal_6016d3643af19.pdfIn PDF document text
    • https://wijirejilape.weebly.com/uploads/1/3/2/8/132816202/7679734.pdfIn PDF document text
    • https://tejukikefuxod.weebly.com/uploads/1/3/4/7/134703803/8457466.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486365/normal_5fe7c8a6c0317.pdfIn PDF document text
    • https://cdn.sqhk.co/xoberuweri/bodtveH/bream_fish_for_sale.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470027/normal_5fe64232a4e97.pdfIn PDF document text
    • https://cdn.sqhk.co/nipigagavadu/9rhhjjo/2048x1152_youtube_banner_maker.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444115/normal_5fee0e1b3bac8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415531/normal_5fc9ee43aec6a.pdfIn PDF document text
    • https://safupoxex.weebly.com/uploads/1/3/2/6/132683070/tuxedodevoxori-kibitiveb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/jufuxizalivox.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/persona_5_confidant_guide_shinya.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/meraxoxepikoribibut.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_off0000f924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF924 5404 bytes
SHA-256: 571b66a645d7a27aec6636f7545e3cf08b9731ab12c3647b31711b95b51ce9d7
font_01_sfnt_off00010b9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B9B 10916 bytes
SHA-256: f00acbab49b01b798ae54b4a489ef8819b3d0f94b94d74a36615ab4a15e320c5