Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b0afb0d8a8ee3c5…

MALICIOUS

PDF

77.9 KB Created: 2021-03-19 20:36:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b62fedf22157b78310c7787f581cb05 SHA-1: 17aec653149ab4823755261af669830bcceb6386 SHA-256: 5b0afb0d8a8ee3c52b60ef9cfe57604d1a88ff8f70e3cd085353219f6b333b5d
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, 'resalured.ru', which is likely used to host a phishing page or deliver a second-stage payload. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of the external URI strongly suggests a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=bolt+thread+size+chart+metric+pdf
    • https://zinebogexorebo.weebly.com/uploads/1/3/1/4/131437984/widasu-firoj-nebaxezawiwade-zudileteravokek.pdf
    • http://lufexaxoxak.mygamesonline.org/ateten_gmlek_romannn_tahlili.pdf
    • https://rizedugo.weebly.com/uploads/1/3/1/4/131453818/103031.pdf
    • https://static.s123-cdn-static.com/uploads/4451545/normal_60001b89b6d2a.pdf
    • https://static.s123-cdn-static.com/uploads/4385614/normal_5fcc84abdbca0.pdf
    • https://ruvudiroxutorag.weebly.com/uploads/1/3/0/7/130775702/2851161.pdf
    • https://cdn-cms.f-static.net/uploads/4413707/normal_603bbd5053d8f.pdf
    • https://zizevazemob.weebly.com/uploads/1/3/4/7/134716229/natuxarikipuge.pdf
    • https://static.s123-cdn-static.com/uploads/4488817/normal_5fcb6f268d4c9.pdf
    • https://katabeguravaka.weebly.com/uploads/1/3/1/4/131407194/e2140.pdf
    • https://cdn-cms.f-static.net/uploads/4366057/normal_5fdbccaa23155.pdf
    • https://static.s123-cdn-static.com/uploads/4487905/normal_5fce3ced498e0.pdf
    • http://xebupado.mypressonline.com/donapemedotewakajilegav.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/dd6b261f-8326-43fa-b276-4bce20a261b4/8123313340.pdf
    • http://nezepalonajiden.epizy.com/jedokaxasagedomosu.pdf
    • https://uploads.strikinglycdn.com/files/ac0310b2-b775-47f5-8e3c-1e692401a505/bapilutawerisajepipa.pdf
    • http://winavetipi.epizy.com/bid_wars_pawn_empire_mod_apk.pdf
    • http://fubojubuzamug.rf.gd/quadratische_gleichungen_erklrung.pdf
    • https://uploads.strikinglycdn.com/files/6d314aed-a51d-4e12-8b6f-ea2f757c4c5a/how_to_know_if_there_is_a_pimple_in_your_ear.pdf
    • http://xupiwepe.epizy.com/bcg_matrix_template_powerpoint.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_off0000f1e6.bin
fdf82364de28ed47b3e05a03150c321c9929eaa219e4bdecf43b03fe15d58e7b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E6 5492 bytes
font_01_sfnt_off00010472.bin
6987fd15854cf6b320d944868d9d795bcf4fb65b1b48911add865a3daffb14c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x10472 11552 bytes