Malicious PDF — malware analysis report

Static analysis result for SHA-256 79e65622e148d331…

MALICIOUS

PDF

88.4 KB Created: 2021-03-25 09:45:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 460fe207e8303185d2e66717fb0f5b4f SHA-1: 783514942930a1e353ad9de1f59ff918bde2b378 SHA-256: 79e65622e148d331d77c7a0eda9ed090f79bf30ffe4122f306d0a97956690fd2
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains keywords that appear to be part of a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/wix?keyword=grendel+john+gardner+pdf
    • http://rubeatyshop.xyz/befabonoristjmuj.pdf
    • http://gosunenibunale.getenjoyment.net/cisa_exam_prep_certified_information_systems_auditor.pdf
    • http://mexicotop.xyz/suggestion_box_form_word_template8ubzs.pdf
    • http://gofadivus.mygamesonline.org/33966362210.pdf
    • http://fullhp.info/38320891365td7ae.pdf
    • http://normal-id.com/toro_gts_6.5_air_filter71htk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/fefa4031-a06c-4455-9ba6-dade913de598/wuvalafozi.pdf
    • https://s3.amazonaws.com/lezopobigeza/blockade_3d_zombie_apk.pdf
    • https://uploads.strikinglycdn.com/files/b8ec5936-73b9-4a3c-8cf6-0943213277b0/24976196805.pdf
    • https://uploads.strikinglycdn.com/files/ac15b353-cfbd-4d49-b242-0c4204d2284e/72673122144.pdf
    • https://s3.amazonaws.com/popilo/ridgid_r2611_orbital_sander_parts.pdf
    • https://s3.amazonaws.com/nezanurugega/jeep_commander_2010_manual.pdf
    • https://uploads.strikinglycdn.com/files/58a581ea-2a8e-4e83-afbe-d4529f3cba6a/joker_the_killing_joke_animated_movie.pdf
    • https://s3.amazonaws.com/vitelitubovuluj/bafg_antrag_formblatt_1_hilfe.pdf
    • https://uploads.strikinglycdn.com/files/7c1b5d3a-59b6-4346-b38f-9c439191a46b/why_we_cant_wait_martin_luther_king_speech.pdf
    • http://tafiwepamubov.atwebpages.com/16015412335.pdf
    • https://s3.amazonaws.com/wulagisi/rividixuturisuri.pdf
    • https://uploads.strikinglycdn.com/files/3eb4d90a-1229-4df2-8e47-aeacaaeeef17/2002_buick_century_engine_diagram.pdf
    • http://kitilogokufalu.atwebpages.com/calculus_partial_derivatives.pdf
    • https://uploads.strikinglycdn.com/files/6a91c70c-7744-4214-9b0b-673c5421ab67/89678015534.pdf
    • https://s3.amazonaws.com/rebomedug/english_dictionary_grammar_check.pdf
    • https://s3.amazonaws.com/ganubifirigevi/fofobufipunodilotejaxo.pdf
    • https://s3.amazonaws.com/jeworurowam/34313392891.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ccb.bin
2ffa50164ee8cadfa2b3cf0e9f6d328b99193227d94845b3d7706092b5c0ed82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CCB 4892 bytes
font_01_sfnt_off00011d6c.bin
de72b8d728c1238888b382a665860d1510614d192cbb9b5cb0873991c410d63d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D6C 12172 bytes
font_02_sfnt_off00014663.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14663 4324 bytes

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