Malicious PDF — malware analysis report

Static analysis result for SHA-256 692c64fa16b6051f…

MALICIOUS

PDF

68.2 KB Created: 2021-03-10 18:12:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 096244c02282da75b0f20ac0704bbe01 SHA-1: 995aa8b4a52c7ab7a76d35acb0763e9d17c0fea7 SHA-256: 692c64fa16b6051fda52f811bb659e25ea5adecdcf13daae145cafd807e22de6
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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://xajibur.ru/wix?keyword=hybridization+worksheet+doc PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4460241/normal_602066a5b5336.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451566/normal_6008186b2d1a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365546/normal_603e64e1d8cf3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453144/normal_6009766b5d13b.pdfIn PDF document text
    • http://paxosij.mygamesonline.org/connect_hp_laserjet_cp1525nw_to_wireless_network.pdfIn PDF document text
    • http://salebox.shop/limits_calculus_infinity_rulesclb6v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447433/normal_602583266ae40.pdfIn PDF document text
    • http://tulomodev.getenjoyment.net/mijigojoratexarexorik.pdfIn PDF document text
    • http://whalesqpa.fun/70309960242do4kq.pdfIn PDF document text
    • http://cardioactiveuficiale.site/30031275527oxy3q.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375886/normal_5fc7e8750b6a0.pdfIn PDF document text
    • http://edaeda.moscow/why_does_cyberpower_beepefglf.pdfIn PDF document text
    • http://marifivelaj.mygamesonline.org/chaos_codex_9th_edition.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mifinuxob.epizy.com/61353278065.pdfIn PDF document text
    • http://duwujupis.epizy.com/how_to_cite_electronic_sources_chicago_style.pdfIn PDF document text
    • http://xevivalekivo.epizy.com/bebizimovumuv.pdfIn PDF document text
    • http://defipezisezujor.rf.gd/lezevotij.pdfIn PDF document text
    • http://talakukatutevib.epizy.com/soridinebimeg.pdfIn PDF document text
    • http://zoniguzetixan.epizy.com/tarasidofimapagujovuru.pdfIn PDF document text
    • http://xuxuxal.epizy.com/nekig.pdfIn PDF document text
    • http://rozafibadajowo.epizy.com/wulaxazifudasejikupinuka.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_off0000cf09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF09 5404 bytes
SHA-256: 4d3917b13f449ea4296b20cc9549d96afbb46802ad23c504050b2a6ac8e4369f
font_01_sfnt_off0000e17f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE17F 10044 bytes
SHA-256: 0feb9df26ea11460a527446f24b4590803b0710c9eb50121f0ae9916383d1b11

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