Malicious PDF — malware analysis report

Static analysis result for SHA-256 e14d3dcb0e62ab25…

MALICIOUS

PDF

84.5 KB Created: 2021-04-09 06:22:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 38be8a2c306d6bcecc6424f6ad2e8828 SHA-1: 702c135cc0c094adde362d2065ebd6b3e63df1da SHA-256: e14d3dcb0e62ab254e2e311d36deece18d435f2c46ac99f6bd2bac9e6d44a4c1
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://dafemum.ru/strik?utm_term=monster+valentine+sayings PDF link annotation
    • https://cdn.sqhk.co/matajikiwov/fiiggjf/lawedenaduku.pdfIn PDF document text
    • http://lebuvowune.getenjoyment.net/grounding_techniques_for_ptsd_worksheet.pdfIn PDF document text
    • http://jetinaxisodew.mypressonline.com/pusexudaniso.pdfIn PDF document text
    • https://cdn.sqhk.co/toriwogadej/fhhjegd/75710247928.pdfIn PDF document text
    • http://bizowokare.getenjoyment.net/auggie_and_me_julian_chapter.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404745/normal_6024595a0f708.pdfIn PDF document text
    • https://cdn.sqhk.co/vemetafije/hgWgfYv/anger_of_stick_4_zombie_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421350/normal_60155bf28320f.pdfIn PDF document text
    • http://vevaxogejaz.scienceontheweb.net/46508631994.pdfIn PDF document text
    • https://zuberexuwaxif.weebly.com/uploads/1/3/4/5/134501439/midetofinem-nusogem-kewuvojad.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/jbhbS8Y/sifixiwabopi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414335/normal_603de4d718bff.pdfIn PDF document text
    • https://buzoraxuv.weebly.com/uploads/1/3/4/3/134366179/4531421.pdfIn PDF document text
    • https://cdn.sqhk.co/runudori/eqhejf7/mobile_classroom_trailer.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/dexodekelaseki/what_is_a_mbti_type.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1359b751-c4cd-4ee6-b7ae-a958fdda8f0c/dujinutuborezipurir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bc8207d-447e-479b-8947-7beca45caf2a/79154017752.pdfIn PDF document text
    • https://s3.amazonaws.com/mivokozibu/health_and_safety_executive_ni_risk_assessment.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/screen_capture_app_for_android.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_off00010cdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CDC 5020 bytes
SHA-256: 9ba3dd2d7cc392329fbd7cfff6cf8bce4957de0d18effc053342a1f594b1de77
font_01_sfnt_off00011e1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E1A 11032 bytes
SHA-256: e46f5b331ebbd5245d12d7874520363720bf17ffe833306084dbe58a89ba5bdd

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