Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d00a293960aa922…

MALICIOUS

PDF

78.5 KB Created: 2021-02-28 08:16:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c5e0511b5906e9162a844324c538e119 SHA-1: 86d3a5722857b0b3c97c1f5d946bcb3ab1328bda SHA-256: 2d00a293960aa922196c903391045f4b5106f7fac75f885b539ac57b3bda3d51
246 Risk Score

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. It uses brand-impersonation credential phishing. 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 7

  • 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 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://boxesagako.weebly.com/uploads/1/3/4/5/134589877/293783a1a076e5b.pdf.
  • 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://kuzutuzo.ru/aws?utm_term=animal+farm+summary+chapter+5+and+6 PDF link annotation
    • https://cdn.sqhk.co/xemugugafot/ziesvZY/41539355919.pdfIn PDF document text
    • https://boxesagako.weebly.com/uploads/1/3/4/5/134589877/293783a1a076e5b.pdfIn PDF document text
    • https://cdn.sqhk.co/limizolaxa/sghiIjc/fudaxowurizunujabaliju.pdfIn PDF document text
    • http://bigtittybella.com/star_vs._the_forces_of_evil_season_4_episode_4tl2kc.pdfIn PDF document text
    • https://fogolimavoburaj.weebly.com/uploads/1/3/0/8/130813413/ditorivopomi_wenixu_wexatijaj_jimowulolutode.pdfIn PDF document text
    • https://tutemedoz.weebly.com/uploads/1/3/2/8/132814241/wudinowevawodatoziza.pdfIn PDF document text
    • https://zorikibezoxima.weebly.com/uploads/1/3/1/3/131384208/4456280.pdfIn PDF document text
    • http://kawlites.online/zizapazoguzovorif0drwg.pdfIn PDF document text
    • http://liolika-rsya.ru/francis_of_the_filth_full_bookz4yw6.pdfIn PDF document text
    • https://cdn.sqhk.co/savimatuv/jTAibib/last_division_survival_war_badge.pdfIn PDF document text
    • https://menudobuwowewil.weebly.com/uploads/1/3/4/7/134765252/famupumaxiv.pdfIn PDF document text
    • https://jutoxanifi.weebly.com/uploads/1/3/5/3/135321179/vikeku-tusaxe.pdfIn PDF document text
    • http://teplotronic.ru/basic_elements_of_musical_play_theatrejx2cl.pdfIn PDF document text
    • https://luwozupewudaxu.weebly.com/uploads/1/3/1/3/131384663/3372342.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nejesezape.myartsonline.com/how_to_reset_bluetooth_earbuds.pdfIn PDF document text
    • http://sutexuvidag.myartsonline.com/how_to_start_a_powermate_3000_generator.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_off0000f63d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF63D 5764 bytes
SHA-256: 04b549b7f71a6c48add1cd5d39ac480070d21f5ccbccd2593928a0186b972598
font_01_sfnt_off000109bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109BD 10404 bytes
SHA-256: 6fb0a4a0751f2f14856aa06dfd60eea22704c9515650d4c3eb7c41e897310a96

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