Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cf4341744705998…

MALICIOUS

PDF

80.3 KB Created: 2021-03-17 22:28:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9e45363d813579309de95d54cb98ce3 SHA-1: e96cd46a2508d8f341f2c863ddb69521def0150e SHA-256: 8cf43417447059980891eb2df389b884b2640c402f25e372ea2ddc9cf6511772
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely used to deliver a malicious payload or redirect to a phishing site. The document body, though heavily obfuscated, suggests a lure related to 'banking awareness' for job recruitment, a common tactic for phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/award?keyword=banking+awareness+pdf+for+ibps+po+2020
    • https://cdn.sqhk.co/fujalapevame/ijkieaQ/ranking_de_dividas_do_futebol_brasileiro.pdf
    • https://cdn-cms.f-static.net/uploads/4378171/normal_604e6cab4e451.pdf
    • https://cdn.sqhk.co/pomorezolo/diiQ7ih/rudekazodin.pdf
    • https://cdn.sqhk.co/xivovido/R3FUgeS/46360621827.pdf
    • https://cdn-cms.f-static.net/uploads/4496151/normal_60125390c4c61.pdf
    • https://static.s123-cdn-static.com/uploads/4489028/normal_5fe23bfd75ba5.pdf
    • https://cdn-cms.f-static.net/uploads/4425506/normal_6051842805d72.pdf
    • http://domifonupesif.iblogger.org/14181410564.pdf
    • https://cdn.sqhk.co/nezerozara/c1Jicib/71371630578.pdf
    • https://cdn-cms.f-static.net/uploads/4417805/normal_60175f1c107ed.pdf
    • https://cdn.sqhk.co/fukafodifi/erZhbjf/answer_key_of_tallentex_2020_exam.pdf
    • https://cdn.sqhk.co/kafexobesa/hbibeVz/invaders_from_mars_1986_review.pdf
    • https://cdn.sqhk.co/rapurakoke/2BFYWcS/nintendo_classic_mini_snes_ebay.pdf
    • https://cdn.sqhk.co/besogevipadi/hiGgij8/fofopi.pdf
    • https://cdn.sqhk.co/juviwonu/icpWLH7/83691792125.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • http://fogabifotu.rf.gd/assam_tet_2020_admit_card_download.pdf
    • https://s3.amazonaws.com/lizuseguwix/broken_angel_remix_audio_song_free.pdf
    • https://s3.amazonaws.com/kewuxejikiwe/vorova.pdf
    • https://s3.amazonaws.com/xokebore/genemoteze.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_off0000ee66.bin
3b21ec6b787b75d04e403a5defcabb2bcd41dc32b5d26b8e2424da1dfd25e040
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE66 5796 bytes
font_01_sfnt_off00010247.bin
6be4c5e1492f9dc8fb24c29a1dea508a3b9f653a4cd1ef62b0f018af88020a66
pdf-font-stream PDF embedded font (sfnt) at offset 0x10247 10992 bytes
font_02_sfnt_off000127d9.bin
ab0b30550c16f0218ea180a56450acc25083be48fb805cb0f6f475dfa13b8319
pdf-font-stream PDF embedded font (sfnt) at offset 0x127D9 2832 bytes