Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ee0e565179bbb19…

MALICIOUS

PDF

69.6 KB Created: 2021-03-29 03:29:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ecae32ce526e79010942ea51a9f22c2 SHA-1: d7a708d267c70e3244e49766c7840f844934f202 SHA-256: 6ee0e565179bbb19b6b378d89f5cc639fbb95cb7f6368682f3cd73953e343557
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO poisoning or phishing campaigns. The heuristic PDF_SEO_LINK_FARM indicates a large number of generated links, suggesting an attempt to manipulate search results or direct users to malicious content. The ClamAV detection as Pdf.Phishing.Trojan further supports the malicious nature of the file. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/wix?keyword=vsepr+theory+molecular+shapes+worksheet
    • https://gekiwudev.weebly.com/uploads/1/3/4/7/134769606/zilibored.pdf
    • https://lulujazopo.weebly.com/uploads/1/3/4/7/134769354/jipavexe.pdf
    • https://zefivevolexu.weebly.com/uploads/1/3/1/6/131637056/4727636.pdf
    • https://kadonomu.weebly.com/uploads/1/3/1/4/131454950/ziwitowifoj.pdf
    • https://sorurilinoko.weebly.com/uploads/1/3/5/3/135397097/wewisikofew.pdf
    • https://buparemekixa.weebly.com/uploads/1/3/0/7/130739227/2086144.pdf
    • https://noxijinijomud.weebly.com/uploads/1/3/4/7/134746703/nusofedijesak.pdf
    • https://talogaxuzule.weebly.com/uploads/1/3/4/5/134596774/bafoj.pdf
    • https://jasasexu.weebly.com/uploads/1/3/1/1/131163864/4965015.pdf
    • https://zazanopub.weebly.com/uploads/1/3/2/7/132712119/6320326.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/92a29cb0-0dcc-4e75-92c8-c4a0036a5cd8/zefivaganewusifaka.pdf
    • https://ac65beef-1c88-4b01-a948-251493ed82f2.filesusr.com/ugd/09857b_0fbe55b99eef441b8fe9bf164e63d88e.pdf?index=true
    • https://s3.amazonaws.com/dixaleko/kilidipiv.pdf
    • https://uploads.strikinglycdn.com/files/2a6bc70f-061c-4efe-8eb8-dfdc461b1df8/honda_generator_eu2200i_companion_inverter_generator.pdf
    • https://s3.amazonaws.com/titugome/booster_app_for_pc.pdf
    • https://abf133a7-37c0-4616-b653-d99fd306bce3.filesusr.com/ugd/5c8236_f0eb1e7aefae4b80b2c5c3ebbb576553.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3bafda3b-dae8-469f-b674-8803f103b602/how_to_make_a_waterer_for_chickens.pdf
    • https://uploads.strikinglycdn.com/files/f8a902f9-cb45-43f6-a217-2f9dcd4301fa/58929870860.pdf
    • https://uploads.strikinglycdn.com/files/bcfd3d8b-1cb7-4a90-b8b5-8c5741560fd8/target_carson_5_shelf_bookcase_instructions.pdf
    • https://s3.amazonaws.com/ditiruz/dasakepefogo.pdf
    • https://38aad9b5-7a72-45b8-ac81-9fe73ce82000.filesusr.com/ugd/08338c_dedc0db068624792b782a99d8968def5.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4e2.bin
c893c95bcad4c70f450e27568b4ce4abb186c91a6f995d2e26f6e3fdacc444ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4E2 5396 bytes
font_01_sfnt_off0000e72b.bin
482739da8d93bf91cb61b572057626bbeac9d1bbe94d7b1a859922b87f91adc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE72B 9752 bytes

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