Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b75289a238c9f92…

MALICIOUS

PDF

70.6 KB Created: 2021-03-17 04:59:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c2f2084dae0f4f48fb23210f009f0562 SHA-1: 6e966d72349886d1a83880540013fb4fd0f9056d SHA-256: 9b75289a238c9f92f5619d256606157e1e0da95c3f204acea56772d74893859d
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file contains a large number of embedded links, many of which point to disposable hosting or redirector services. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a strong likelihood of malicious intent, such as phishing or SEO poisoning. The ML classifier also flagged this PDF with high confidence.

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://crophysi.ru/award?keyword=filsafat+al+ghazali+pdf In PDF document text
    • http://lologunaw.mygamesonline.org/xujifefetideb.pdfIn PDF document text
    • https://rawunixu.weebly.com/uploads/1/3/4/5/134527334/6713932.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373519/normal_5fe759d4bf22b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487423/normal_600ce0e57661d.pdfIn PDF document text
    • https://kiwazavu.weebly.com/uploads/1/3/0/7/130776346/9527112.pdfIn PDF document text
    • https://cdn.sqhk.co/dafibuxoki/idVFui6/scalextric_bilbane_platinum_gt_arc_pro_digital.pdfIn PDF document text
    • https://fuwowomazusora.weebly.com/uploads/1/3/4/0/134000162/poxaxonigaj.pdfIn PDF document text
    • http://jasazotinalol.mygamesonline.org/93799810246.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448542/normal_5fc857e956bba.pdfIn PDF document text
    • https://rolorizumi.weebly.com/uploads/1/3/4/3/134316308/molakedegusojati.pdfIn PDF document text
    • https://jawimuxuketeg.weebly.com/uploads/1/3/4/7/134763527/wojezeguvo-miripatoxamave-pomuxusowija-padijo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406482/normal_5fce865ae661a.pdfIn PDF document text
    • https://niwesebo.weebly.com/uploads/1/3/4/4/134401773/subamuzozurok.pdfIn PDF document text
    • http://porizaritofo.mypressonline.com/24164964462.pdfIn PDF document text
    • http://nogurufegu.mygamesonline.org/gta_v_premium_edition_ps4_what_do_you_get.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479905/normal_5ffd0a2c1ed76.pdfIn PDF document text
    • https://gakewejodum.weebly.com/uploads/1/3/4/9/134902465/89dd0.pdfIn PDF document text
    • https://cdn.sqhk.co/kibutonap/hhmie3d/13514066109.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://robefopatobut.epizy.com/37138725279.pdfIn PDF document text
    • http://zixadadafupeg.epizy.com/is_korean_more_similar_to_chinese_or_japanese.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
    • https://doi.org/10.14421/ref.2016.%25xIn 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_off0000d775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD775 5212 bytes
SHA-256: 24df661f3e861ce07f3193bc14100a6f8235bc79b7d41a16ab3a8a05e68b7b44
font_01_sfnt_off0000e93d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE93D 10256 bytes
SHA-256: 0c1eff9ecaca4db7cfd1b5bf4246601e2aa71dcb89ee288cb6f51f51749769d7