Malicious PDF — malware analysis report

Static analysis result for SHA-256 0958b4f5195a56c9…

MALICIOUS

PDF

80.0 KB Created: 2021-03-22 14:43:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63a455d3a93f53044dd4ba2a14142e4a SHA-1: 2045d0015008232777426cc4c780f44adcac155f SHA-256: 0958b4f5195a56c9282096f207bd04f2d9e6e96e58fadf0a459782916ff36f7d
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a malicious domain, likely to host a phishing page or download further malware. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, contains text related to 'Beats studio 3 review' and 'wkhtmltopdf', suggesting a lure to a malicious site.

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://zajinet.ru/strik?utm_term=beats+studio+3+review+what+hifi
    • https://cdn.sqhk.co/jozopotuwomo/hdghjfw/labozenonijokozuk.pdf
    • https://cdn-cms.f-static.net/uploads/4475847/normal_604fa7ab43c65.pdf
    • http://nutosuvitiraj.scienceontheweb.net/ball_valve_types.pdf
    • https://cdn-cms.f-static.net/uploads/4368226/normal_602becea00aec.pdf
    • https://cdn.sqhk.co/daxegajok/jHPUjhL/emoji_balls_of_loved_one.pdf
    • https://static.s123-cdn-static.com/uploads/4456372/normal_5ff26c8415ff2.pdf
    • https://cdn.sqhk.co/taxeseta/Mgfhagj/dasumiri.pdf
    • https://static.s123-cdn-static.com/uploads/4479454/normal_5fe08fa11edce.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/370b7b67-c31d-4eaf-b1d1-d2ccbe113c7b/68579405597.pdf
    • http://gupatevefojip.myartsonline.com/99700807094.pdf
    • https://s3.amazonaws.com/napoledunadigo/the_white_tiger_movie_budget.pdf
    • https://s3.amazonaws.com/dozuga/connected_no_internet_android_moto_g5.pdf
    • https://s3.amazonaws.com/wupiwupiwot/18959872022.pdf
    • https://s3.amazonaws.com/kigavanus/cbse_marksheet_2015.pdf
    • http://fusozevukatamir.atwebpages.com/78913428473.pdf
    • https://s3.amazonaws.com/nitizobuv/46223338914.pdf
    • http://nejesezape.myartsonline.com/does_sat_give_you_math_formulas.pdf
    • https://uploads.strikinglycdn.com/files/6a40f61d-06fc-4653-a80d-6c5622c4898c/la_la_land_movie_in_spanish.pdf
    • https://s3.amazonaws.com/dibedamoka/titration_curve_of_all_amino_acids.pdf
    • https://uploads.strikinglycdn.com/files/3df4a922-ee67-481b-a025-bf64c9c3b099/28643055964.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_off0000fa75.bin
399b6fe3d1ee4bddccc9b510943521d5c16b1d614f5fd5d7ef5266e0a2d0a338
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA75 5328 bytes
font_01_sfnt_off00010ca7.bin
b47fb45e7f1b22a1857a4b37a324497aa1ae03622a69164bf25c40835589b92b
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA7 11372 bytes