Malicious PDF — malware analysis report

Static analysis result for SHA-256 413207dab2e0102b…

MALICIOUS

PDF

82.8 KB Created: 2021-04-06 17:29:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: e49d5353d0d1c90bc123106ae10a3049 SHA-1: 50d70890d360fce397e7b56c7f4e840cf29f9ebe SHA-256: 413207dab2e0102b02c78165c39ac2d14c45c2dc0acfe223b6b1f2dcb6003be5
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high-confidence ML classifier and ClamAV detection indicating malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a tactic to obscure the true destination by using many disposable domains. The primary malicious URLs identified are likely part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dugedepap.ru/aws?utm_term=brother+p-touch+h100lb+handbuch PDF link annotation
    • http://mebotus.mypressonline.com/academic_transcript_example.pdfIn PDF document text
    • http://pedumerik.sportsontheweb.net/98043925238.pdfIn PDF document text
    • http://nipijapogila.sportsontheweb.net/958674103.pdfIn PDF document text
    • https://cdn.sqhk.co/lafugafeniki/ahi5he7/29752201456.pdfIn PDF document text
    • http://bimadepunepi.mypressonline.com/drugs_in_anaesthesia_and_intensive_care_free_download.pdfIn PDF document text
    • http://ligexekena.mywebcommunity.org/objective_c_tutorial_point.pdfIn PDF document text
    • http://bijipejip.iblogger.org/which_atom_in_each_pair_with_the_larger_atomic_radius.pdfIn PDF document text
    • http://tawaguf.scienceontheweb.net/11466421219.pdfIn PDF document text
    • https://cdn.sqhk.co/jemedolena/hjfBhdr/72140395626.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://jokodeg.rf.gd/accounting_theory_hendriksen.pdfIn PDF document text
    • http://tikeresepujel.onlinewebshop.net/sanisazepesufafibidi.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/disable_button_onclick_android.pdfIn PDF document text
    • https://da550aaf-34ae-4f9b-ad82-7836b82beebe.filesusr.com/ugd/a203e6_72e2a771dc1b4f4892f8a81ff6bfd05f.pdf?index=trueIn PDF document text
    • http://letutemoxeluz.onlinewebshop.net/76353679828.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/xedobobenetotowirulopolu.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/44153682799.pdfIn PDF document text
    • https://9dd02728-8b0e-4c16-8a5b-31b14a6ec887.filesusr.com/ugd/d8c3ed_69b3d3996ac7473fb82a976e50093ed8.pdf?index=trueIn PDF document text
    • http://xapipulasojogod.epizy.com/69804197921.pdfIn PDF document text
    • http://sazasewugekupej.onlinewebshop.net/85690069600.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF763 5232 bytes
SHA-256: d3c81f7683e03b324d8d24c683a39bac14d138af9660a8a94b316b32f8b4c236
font_01_sfnt_off0001092c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1092C 11812 bytes
SHA-256: c14da0cecf05fe597d00941c5328ecbcb965fb48c622d59b5e6ebfabdea4ecaa
font_02_sfnt_off0001300c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1300C 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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