Malicious PDF — malware analysis report

Static analysis result for SHA-256 4126e78d79b9ac4b…

MALICIOUS

PDF

73.1 KB Created: 2021-03-09 06:31:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b8ef8142e40883a9df428563d5148d9 SHA-1: 56108bcfae1eea733a4589db98b4d3eea5c6cee6 SHA-256: 4126e78d79b9ac4b7dfb3f13d12042cba20791433c9d5a5cb3311f6058f6ca44
96 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 an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to be related to search results, reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://jumiwimov.ru/wix?keyword=mahindra+oil+filter+cross+reference+tractor
    • https://tevufipe.weebly.com/uploads/1/3/1/6/131606546/zetelekizupiwo.pdf
    • https://cdn.sqhk.co/xejudawadoni/jbMPqEU/archery_elitetm_free_multiplayer_archero_games.pdf
    • https://cdn.sqhk.co/wabitakenina/IghGsgc/interview_questions_on_dbms_with_answers.pdf
    • https://movediwifed.weebly.com/uploads/1/3/2/6/132695881/fapipefukid.pdf
    • https://fepagefifumowa.weebly.com/uploads/1/3/2/6/132681901/lodikek.pdf
    • http://sowaviwexurejo.22web.org/ford_explorer_repair_manual.pdf
    • https://nenefifozotuve.weebly.com/uploads/1/3/0/8/130874038/fizumupofekegavuru.pdf
    • https://cdn.sqhk.co/nivazesoj/EOifhfw/3d_printed_basketball_holder.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/9321b8a1-833e-4a56-8439-8d3a9f953d32/ryobi_2700_psi_pressure_washer_price.pdf
    • https://0f0532cb-4478-41f9-91a1-cf277c4732ec.filesusr.com/ugd/8acad3_f2e5571792594c8580fa50c6d3835093.pdf?index=true
    • https://uploads.strikinglycdn.com/files/15c38887-d8c8-414f-bbe3-5a5e096a6117/40803098367.pdf
    • https://uploads.strikinglycdn.com/files/6bae78c5-646c-47aa-a914-f1b557b376e0/53870130317.pdf
    • https://uploads.strikinglycdn.com/files/3e67babe-7b18-4d20-809c-fbe28af879a6/divulavigekozokud.pdf
    • https://uploads.strikinglycdn.com/files/5fe3fe91-6307-464d-8f76-35ac50c7d0a7/how_many_books_are_there_in_artemis_fowl.pdf
    • http://kajonefev.rf.gd/peveditaxif.pdf
    • https://203e7bc3-08d7-4ecc-a8df-f797e0d4a079.filesusr.com/ugd/d4579c_d28488e483eb47819aa26a870ca97671.pdf?index=true
    • https://uploads.strikinglycdn.com/files/766fffe8-20b3-4910-a80d-248ce73955cb/60686158415.pdf
    • 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_off0000e2a4.bin
505ee0ff2a0ca636b0603323d3bb6530558b50ec987aa8fc4c8a10e297061882
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A4 5116 bytes
font_01_sfnt_off0000f40f.bin
45fbfcb56742539edd86c57434b26e998df02d83ebd00f008504a8a730f01725
pdf-font-stream PDF embedded font (sfnt) at offset 0xF40F 10256 bytes