Malicious PDF — malware analysis report

Static analysis result for SHA-256 779de0d549994df6…

MALICIOUS

PDF

83.6 KB Created: 2021-04-26 16:17:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a2eb82f75386d64fa51bd13a7ae7b29a SHA-1: d8f2dd938cb65d9960634cbca6933232c858d7cd SHA-256: 779de0d549994df645b63fdaf9991d87fea5d35fdc07e88d597051fe67db2971
126 Risk Score

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/strik?utm_term=2005+dodge+ram+1500+slt+quad+cab+4x4+specs PDF link annotation
    • https://cdn.sqhk.co/sokulutesi/jbhWieJ/xixewasatexu.pdfIn PDF document text
    • http://ryukzak.digital/33708877369x8b1h.pdfIn PDF document text
    • https://cdn.sqhk.co/gogojiranat/ojdy3if/zixebobivisukowerineme.pdfIn PDF document text
    • https://cdn.sqhk.co/gawagunikuw/TUhdXMd/ppsspp_psp_emulator_apk.pdfIn PDF document text
    • http://zexejodubaxiku.mygamesonline.org/foxibovilupope.pdfIn PDF document text
    • http://4d-5d.com/stair_runners_carpet_right16et1.pdfIn PDF document text
    • http://gisoboxizaza.mygamesonline.org/96039674741.pdfIn PDF document text
    • https://cdn.sqhk.co/gigatakel/6lakTWo/mikopugasigog.pdfIn PDF document text
    • http://gagogepatajebe.medianewsonline.com/zegilijejig.pdfIn PDF document text
    • http://geosen.net/how_to_create_wallpaper_for_iphone_ios_14p7kbe.pdfIn PDF document text
    • https://cdn.sqhk.co/pigevikuwi/zgjdxgc/racer_off_road_vehicles_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/pasivuzuke/gLYR7Xb/battleship_unblocked_games_66.pdfIn PDF document text
    • https://cdn.sqhk.co/xituvusaw/hjaibQV/planet_of_the_apes_caesar_no.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/semuxemakaw/46640121770.pdfIn PDF document text
    • https://37459de8-d961-4a2a-897a-801dad55dcfc.filesusr.com/ugd/1395e2_872667642fe942a38e45db7c85ede641.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pilazi/kasomuxixafuzu.pdfIn PDF document text
    • https://97e6e6c8-040d-427c-ad66-6ef02350ae38.filesusr.com/ugd/9c523c_187ac0ec5e9c45ad8ab4c056f68e177c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/figugipopar/classical_mechanics_goldstein_3rd_edition_solutions.pdfIn PDF document text
    • https://4b0cdf75-2e42-4830-99f1-bbdbaec3f661.filesusr.com/ugd/891219_67ab9e45dcfc484186ad96db42e1cea1.pdf?index=trueIn PDF document text
    • http://lewinozed.atwebpages.com/nibelogil.pdfIn PDF document text
    • https://d33b8dfc-9792-4d26-9d81-613d0bd32a71.filesusr.com/ugd/d34367_003490d530c34d4f89afe04ca152dbdd.pdf?index=trueIn 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_off000105bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105BC 6172 bytes
SHA-256: d11d59b4a0fca7604fced8521149dd2d4d7248eb73dcd3704dc4f991a89f5866
font_01_sfnt_off00011aa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AA8 11288 bytes
SHA-256: 388b31de9081c11dbb2ce21de8894fc5e007dce2392c1b2205adafb996e9e3d8

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