Malicious PDF — malware analysis report

Static analysis result for SHA-256 7acf068988f5c352…

MALICIOUS

PDF

76.4 KB Created: 2021-03-15 11:08:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 29a8ad323722c87ffc987ad11e205062 SHA-1: 582a7b579da1e38508524b35edf269cdbdb64a1e SHA-256: 7acf068988f5c3529358e6bfc05307a1bdd982f65ad4c7f0663ddcadb1e8cda3
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://lozipotod.ru/award?keyword=bcg+business+model+innovation+pdf PDF link annotation
    • http://songkfrk.site/fafiforiwuvufuteguouxco.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413474/normal_6037a2f5ec9a2.pdfIn PDF document text
    • http://batmbatm.ru/where_she_went_endinggg5od.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474465/normal_6000e9640119e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474206/normal_5fecc4e5134c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378157/normal_600f7581d4ad1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409093/normal_60045a89f0f6a.pdfIn PDF document text
    • http://sutarakikim.scienceontheweb.net/fudova.pdfIn PDF document text
    • http://gifinibufenatar.medianewsonline.com/givisalusop.pdfIn PDF document text
    • http://gowanenutik.mypressonline.com/fallout_4_companion_perk_without_romance.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vawanumezal.onlinewebshop.net/56862726444.pdfIn PDF document text
    • http://dexifuv.epizy.com/15922331551.pdfIn PDF document text
    • http://lafebevu.rf.gd/44215364389.pdfIn PDF document text
    • http://gezixus.myartsonline.com/98012653599.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66e6e036-1c14-40e2-9d2e-88760a273a47/the_vampire_lestat_audiobook_free.pdfIn PDF document text
    • http://zowuxepalaget.epizy.com/mejariwuxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53fd6882-86c4-4d70-9672-6294091c7ebc/what_does_partner_wod_mean.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/angularjs_bootstrap_website_template.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/druid_leveling_guide_dnd_5e.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7ce7467-5758-43e0-8123-ad31cb2a79d4/troy_bilt_675_series_190cc_lawn_mower_parts.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_off0000eb45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB45 5628 bytes
SHA-256: 2ad428e3f3cddb125e368d24c94bf82f6d3a32e11361e5a0fb9a204e99513492
font_01_sfnt_off0000fe65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE65 11116 bytes
SHA-256: 269fb0869b7c2cff9b6f3917f22ea0cfb84df0d1676353d2e8fe3f6fd4ff97cb

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