Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbc7c8cff7b862fc…

MALICIOUS

PDF

79.1 KB Created: 2021-04-07 01:15:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2456bea776c780dec0a3072a21f8d2d7 SHA-1: aa72e438963f0e522bc83d41f438e6b1e04ff940 SHA-256: dbc7c8cff7b862fc35fb46468e250492e4c74248241547b18264c2505c21ac20
156 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. 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 0.9995

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 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.
  • 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=networking+interview+questions+and+answers+pdf+free+download PDF link annotation
    • http://movizopolu.medianewsonline.com/87098505020.pdfIn PDF document text
    • http://bexowobiminefi.mywebcommunity.org/nejovoma.pdfIn PDF document text
    • http://niburufajanuto.sportsontheweb.net/65894646385.pdfIn PDF document text
    • http://bestrongbyg.com/order_to_watch_marvel_netflix_shows_2019hqk1t.pdfIn PDF document text
    • http://fsbsiod.com/burger_king_nutrition_whopper_jr_with_cheese5a9a8.pdfIn PDF document text
    • http://vvvvvvvvvvvvvvvvvvvvvb.xyz/46331299439174h0.pdfIn PDF document text
    • http://firstsecu-paypal.com/citroen_c3_picasso_service_manualx1bru.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kipuredig.rf.gd/xuporivisuvol.pdfIn PDF document text
    • https://0e818273-c791-4c7a-b20f-750474b78fe4.filesusr.com/ugd/362633_37b41713e34e4d099ac64286d0508e86.pdf?index=trueIn PDF document text
    • https://cb0508fd-2a1f-4901-a161-a76823ee8e4f.filesusr.com/ugd/52013e_d03bf99b04754710a6e214b9878e2155.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/casting_crowns_full_album_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/logitech_harmony_300_remote_codes_database.pdfIn PDF document text
    • http://kewagar.epizy.com/diaphragmatic_breathing.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/how_to_factory_reset_iphone_5_without_itunes_forgot_passcode.pdfIn PDF document text
    • https://s3.amazonaws.com/kalanejaxutilif/46901539827.pdfIn PDF document text
    • http://dotopaku.atwebpages.com/kiran_psychological_aptitude_test_book_free_download.pdfIn PDF document text
    • https://de2a8dfc-dc8d-4d62-be3b-f97abdd17bf6.filesusr.com/ugd/c722c2_cb20cc2aee7a44828173d42c22631cc4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/62937544806.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE6 5520 bytes
SHA-256: 1ad643836065a0f8169b6ed346c47309cd0408d51546c33927bb903a0f279001
font_01_sfnt_off000112d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112D8 10536 bytes
SHA-256: 2f8436ba2ad133cc13a1f8b27c08bddeece6eb9283671e00059f416e0df5ddf1

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