Malicious PDF — malware analysis report

Static analysis result for SHA-256 46aaca50d0244ac7…

MALICIOUS

PDF

73.3 KB Created: 2021-03-29 18:22:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d62ed3d380bc9969d60b9512925ddeec SHA-1: 887539c02ff207a62a82942e2e4cefed79e80b08 SHA-256: 46aaca50d0244ac75353794e43e31f8d4b0e523a2dbab111ef96852d88802702
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://jumiwimov.ru/wix?keyword=attestation+letter+covid PDF link annotation
    • https://cdn.sqhk.co/baxotonad/Mphiiij/random_space_facts.pdfIn PDF document text
    • http://datab.vip/diy_halloween_paper_crafts_easyme41e.pdfIn PDF document text
    • https://cdn.sqhk.co/gipagigo/pjgMDgi/arena._io_cars_guns_online_mmo.pdfIn PDF document text
    • http://latencfsrt.space/vebisanbbwbq.pdfIn PDF document text
    • http://instgramcopyrightdispute.com/tai_chi_teaching_videoev1zo.pdfIn PDF document text
    • http://1ux.site/240334794223iii6.pdfIn PDF document text
    • https://cdn.sqhk.co/kidatufo/hidjhja/love_live_wallpaper_download_hd.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzetuzame/fgdfShi/kingdom_connection_fellowship_columbus_ohio.pdfIn PDF document text
    • https://cdn.sqhk.co/rogudokives/bc4gdHF/chris_tomlin_jesus_this_is_you.pdfIn PDF document text
    • http://alteramaks.world/49932078918akjqd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://76c9fb28-c10e-4950-85be-37de24a2ede8.filesusr.com/ugd/fa32a6_6675c8f72ce440208dab9558723b4b67.pdf?index=trueIn PDF document text
    • https://8c1dc56a-a131-4b43-acff-3635b9115217.filesusr.com/ugd/90423f_92b088108bd044d2a2c87bda2568a111.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fc6e812-e2f4-4265-b5f6-4f83a4dabac4/what_are_the_best_replacement_bands_for_fitbit_charge_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0db5a01b-97e1-4f1d-aeba-4444434c2035/74510455345.pdfIn PDF document text
    • https://ea74ff18-003d-4094-8454-8d7e15e33abb.filesusr.com/ugd/50de67_7b5f75d6941146eea9511b3ba33f96e9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zagubip/safe_drive_save_life_report.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/buzakof.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/91222978365.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_off0000e1ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AB 4980 bytes
SHA-256: 72208b495d29461e29aa35aec38654a49c41a192a903291f3e97a0faef5d80f3
font_01_sfnt_off0000f2ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AE 11028 bytes
SHA-256: 974607bdc55a64b1a8364a21b18d2540c425716d03e77f2e98b3f070055d9573

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