Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbb9d9b96accb0e8…

MALICIOUS

PDF

89.7 KB Created: 2021-04-05 07:40:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c8bc93033891d6979a90d390c716e6b SHA-1: b46a65b6b01ebbcb0f836a26b0cbc14b8bc3d1f2 SHA-256: fbb9d9b96accb0e86dd48b5bd8320afb9854e63b4db8aa8069befb4c4a898291
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 URL that, when clicked, likely leads to a malicious site. The document body, though heavily obfuscated, appears to be a lure related to device repair, suggesting a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://zajinet.ru/strik?utm_term=how+to+replace+samsung+galaxy+tab+e+battery
    • https://cdn-cms.f-static.net/uploads/4426418/normal_60564bf209465.pdf
    • http://winfreeiphone.xyz/wall_street_journal_prime_rate_history_excel9wu26.pdf
    • https://cdn-cms.f-static.net/uploads/4490735/normal_60302b2a0d8a8.pdf
    • http://tapagigozi.medianewsonline.com/english_terms_word_search.pdf
    • http://dihtyar.online/jikeg2ij52.pdf
    • https://cdn-cms.f-static.net/uploads/4446280/normal_604976c53c586.pdf
    • https://cdn-cms.f-static.net/uploads/4421205/normal_6038c80dbfc16.pdf
    • https://lekumoga.weebly.com/uploads/1/3/2/6/132683130/xijazog.pdf
    • https://rudofodirofebas.weebly.com/uploads/1/3/0/7/130739781/pomaxetetipetazit.pdf
    • https://nepuvojikonutoz.weebly.com/uploads/1/3/4/6/134677469/jozaliwukedogives.pdf
    • https://cdn-cms.f-static.net/uploads/4476767/normal_60604f323d950.pdf
    • http://sidufapas.mywebcommunity.org/jizovigoj.pdf
    • https://static.s123-cdn-static.com/uploads/4467019/normal_5ffcb76d23d2d.pdf
    • http://ruxovesubilesuk.22web.org/architectural_graphics.pdf
    • https://cdn-cms.f-static.net/uploads/4463810/normal_60170bc31195c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://noratev.myartsonline.com/11395180787.pdf
    • http://benapubusepem.rf.gd/pijofuku.pdf
    • http://ranoponadugat.epizy.com/jifotofa.pdf
    • http://rusakarazixano.epizy.com/child_development_and_pedagogy_in_marathi.pdf
    • http://wereguvepowu.epizy.com/lagu_gratis_waktu_yang_salah.pdf
    • http://biwosagamivi.myartsonline.com/jebitovipakalivepivafen.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_off00011e9b.bin
9094802372619696d33cfad6be9e837609be8c5ab2614c6cf9eca18619ecc87c
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E9B 5616 bytes
font_01_sfnt_off000131b0.bin
dc8e42f4a9c16b8a10747f2345ce0b5dcf71f421ed3ac1f7bc81791d2968b30c
pdf-font-stream PDF embedded font (sfnt) at offset 0x131B0 11680 bytes