Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a0df397a86d38c2…

MALICIOUS

PDF

101.7 KB Created: 2021-03-25 17:26:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 8f205500b0eb5dda5c56e4c34dec6b0a SHA-1: 9fa371c1e78f1db11ed681a184977e87901480fe SHA-256: 8a0df397a86d38c2629f278fd2f5781c0ed466cd6ecd91225eff68945f7b4188
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, many pointing to disposable domains, and one prominent URL suggests a lure for game downloads. The presence of embedded URLs and the overall structure indicate an attempt to redirect users to malicious content, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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/strik?utm_term=donkey+kong+64+remake+download PDF link annotation
    • http://vonexalux.sportsontheweb.net/66717328717.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448549/normal_604d3ff963c96.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391642/normal_5ff4133cc36e5.pdfIn PDF document text
    • http://dusibarupuguli.medianewsonline.com/xasifakebugifik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394060/normal_601595de541cd.pdfIn PDF document text
    • http://narovomesizi.medianewsonline.com/sidozisirufona.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388181/normal_604129978f7e8.pdfIn PDF document text
    • http://lefefegibilapo.22web.org/annamayya_patalu_video.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4cf2acc4-d143-4013-a78d-f21de0873c4f.filesusr.com/ugd/e4636f_7f9dc8e0bbec4c369b58d48d53792522.pdf?index=trueIn PDF document text
    • https://bf808793-8b46-4c54-8b11-319763181fa0.filesusr.com/ugd/0d018b_0d003817e51b4a9fb55ae465bf7be009.pdf?index=trueIn PDF document text
    • http://sabozovitebem.rf.gd/husqvarna_automower_105_manual.pdfIn PDF document text
    • https://11f44e1d-c86f-4be6-baa1-90970e7c24f5.filesusr.com/ugd/a298ce_624231d433b548a383d6df3ea8b1421b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c54257a3-fef9-4e20-9b03-b4a49e52a989/let_the_right_one_in_book_eli_castration.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0b4e810-0b9e-40ea-b8c8-736e006cb1ba/dell_mouse_ms116t.pdfIn PDF document text
    • http://nikavavufuxirel.epizy.com/psychological_testing_and_assessment_9th_edition_free.pdfIn PDF document text
    • http://kesupipipiret.onlinewebshop.net/craftsman_42cc_chainsaw_carburetor_adjustment_tool.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85c6ce0d-a91e-4da0-bcfe-37591a043e28/ditonovodibosodobasixozal.pdfIn PDF document text
    • https://3485775d-af35-4505-8fb4-f6750f575e04.filesusr.com/ugd/42f18e_530227466ce0440f8e2c531aaed54998.pdf?index=trueIn PDF document text
    • https://551f0ad2-75d1-4009-b90b-2f3e3e20230b.filesusr.com/ugd/c2bf0a_d311cf0381be45a3aeda015031bc1abd.pdf?index=trueIn PDF document text
    • https://07e0a16e-b77d-475b-b724-88bbaedb347c.filesusr.com/ugd/8e9e2f_afaa0e85524a4cc1a9b1cc8507a75daf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a6cb104-9529-4b9e-bb14-05d764149eb4/samsung_grand_prime_plus_battery.pdfIn PDF document text
    • https://8ed7b8cb-9bae-4def-ad9b-66b28cd11f91.filesusr.com/ugd/740d8c_30b81cca694e4cac85c8e6ff860b1d67.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013ff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FF3 3904 bytes
SHA-256: 284ac4d49f30245bfa871b77c233c775f64b6e3554a7306560122e2dd8650552
font_01_sfnt_off00014dbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DBD 5464 bytes
SHA-256: 98ce016c5f27d64c0482691645acadbc185a61f6eb83993b3ab3a652263c821d
font_02_sfnt_off0001606a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1606A 12180 bytes
SHA-256: 9d4f4cc7629e79fbbc1fe7ca9b286b163043515c133c2058db0bdda127c6bc34