Malicious PDF — malware analysis report

Static analysis result for SHA-256 b413afea08d3b3ca…

MALICIOUS

PDF

85.4 KB Created: 2021-05-16 19:59:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bf4cd4dca05b62060982fb4090211da SHA-1: 99e8a69707e463bdc59cc38fb54215894907cbfc SHA-256: b413afea08d3b3ca8909e011dd261b2f70ca9d779e4f36f1501c4a852911087a
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that leads to a phishing site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to a product manual to entice users to click the malicious link.

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/strik?utm_term=energy+power+bar+soundbar+manual
    • https://static.s123-cdn-static.com/uploads/4410190/normal_600065dd56f25.pdf
    • https://cdn.sqhk.co/fazologim/1cibia5/sokumejafepefevizik.pdf
    • https://cdn.sqhk.co/zojixemem/hxuMgwE/47889205750.pdf
    • https://cdn.sqhk.co/nenuguvan/dje6Eih/pawixapux.pdf
    • http://takipibimaxubov.sportsontheweb.net/searchs_on_iphone.pdf
    • https://cdn.sqhk.co/rolidofajug/hgegcii/vesazekufiguzobupibit.pdf
    • https://cdn-cms.f-static.net/uploads/4426688/normal_600a8de182b4b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/c3e324d0-10e9-44e0-beb8-8dae9180f255/curse_of_the_crimson_throne_map_folio.pdf
    • https://s3.amazonaws.com/mikibetiv/sonibudutipatowiw.pdf
    • https://a7474f5d-6ec7-41e4-954d-8cb0a6a0c5ec.filesusr.com/ugd/b987d2_8aa3aeb2a633414192355dc1b279c80b.pdf?index=true
    • https://bef89f6e-6323-4b84-ad9d-a44490bfcc4f.filesusr.com/ugd/96768c_b8e8be4a156f4f1094cccc1999a073ae.pdf?index=true
    • https://s3.amazonaws.com/rojalexipokadaz/amazon_web_services_list.pdf
    • http://peruroz.onlinewebshop.net/94995322068.pdf
    • https://e1dd9d5d-2564-403b-b9eb-750b563e155e.filesusr.com/ugd/00b056_af0d4fb95c6941aba9bce0ba9e1f0ea9.pdf?index=true
    • https://uploads.strikinglycdn.com/files/afb63f4b-22ce-469f-90c3-390313aaa790/nokujezezazo.pdf
    • https://uploads.strikinglycdn.com/files/d480b3c5-12b4-43df-b9aa-8271fed7cc8f/how_many_quarts_of_oil_does_a_ford_3000_tractor_hold.pdf
    • https://uploads.strikinglycdn.com/files/9716e751-587d-4e8c-aa6e-b2c18135a2f8/97235666433.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_off0001038e.bin
f79875b752b9e7482d6fcfcc2fbf586481c18849c57bcf5ccb416bbf2103a787
pdf-font-stream PDF embedded font (sfnt) at offset 0x1038E 5324 bytes
font_01_sfnt_off00011592.bin
c08199eeef13dae87fd57e27a38eb7bb49a491172788ba11df06eca5dcb0b7df
pdf-font-stream PDF embedded font (sfnt) at offset 0x11592 10752 bytes
font_02_sfnt_off00013a5a.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A5A 4324 bytes