Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc7c1d4de8df01b3…

MALICIOUS

PDF

79.9 KB Created: 2021-04-25 00:28:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: eecbc6385d0feadef78c90b5abe48845 SHA-1: 53ad1b03e525482272dbd207a4fc4928d97bf578 SHA-256: cc7c1d4de8df01b35eda2a1b0ea95cdfecb11c0caf3f963598679c753bd30e73
126 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, indicating a phishing or trojan threat. It contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain that appears to be part of a link farm designed to redirect users. The document body, though heavily obfuscated, suggests a lure related to product advertisements, likely intended to trick users into downloading a payload or visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://soxebez.ru/strik?utm_term=jlab+jbuds+go+air+in-ear+sound+isolating+truly+wireless+headphones PDF link annotation
    • https://cdn.sqhk.co/viwiratoposu/jfhdDjb/gears_logic_puzzles_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vanewano/ehg3Wgd/kuxazenoveriwosuguzagivo.pdfIn PDF document text
    • https://cdn.sqhk.co/tekunipifob/d9hfGpF/felalewikimulanuzukamo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367644/normal_603249b634ecb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401972/normal_602858133156c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420934/normal_5fff82caa3df2.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefima/a7Uiihc/29231293544.pdfIn PDF document text
    • http://dakekunagefasak.sportsontheweb.net/xetewumajanawudeji.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dazejifudora.onlinewebshop.net/algebra_problems_with_solutions_and_answers.pdfIn PDF document text
    • https://7f793f8f-877f-420e-851b-8bae9ea62a4d.filesusr.com/ugd/78c764_1a72536856b7460db3cc956926c22e1c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbaeca74-10e2-40f4-8a2f-c3fcb80cc83a/57022598422.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1f313dd-e858-4ec5-8044-88113e3f7ad3/build_my_life_song_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f06ba0b-ed0e-4349-8dbd-6349b7ea23ad/how_to_start_career_in_structural_engineering.pdfIn PDF document text
    • http://besakowipati.rf.gd/classroom_language_esl.pdfIn PDF document text
    • https://9d50af6f-dbf7-41ba-b854-83985329a12b.filesusr.com/ugd/33c377_3d83b57e51f246f7a232e0144cc6d29c.pdf?index=trueIn PDF document text
    • https://bd7a0a6f-bbfd-49cc-ba41-c3f2778102d9.filesusr.com/ugd/9ea91e_56557e502190410b871589a92ec4f297.pdf?index=trueIn PDF document text
    • http://jusisow.rf.gd/zuwekewajogurad.pdfIn PDF document text
    • https://de99934f-f465-4d69-af5e-14f317c0a7c6.filesusr.com/ugd/4fea5c_31c94a1490e44f77b5b1df1f24e16e46.pdf?index=trueIn PDF document text
    • https://fe2b84af-b373-48e0-a714-f820169e3fe9.filesusr.com/ugd/ed1d2e_1279ebd1648540c8bb13cb087761e277.pdf?index=trueIn PDF document text
    • http://xologikaju.atwebpages.com/sizilapelasakananif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/971a317d-502b-4215-900f-7674e6b42c32/the_heiress_chinese_drama_sad_ending.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A5 5652 bytes
SHA-256: f3963a4258d6188f15700b6a0b1585f7befbe89fbb01128a7c471d570241647e
font_01_sfnt_off00010bf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF4 11076 bytes
SHA-256: 4d40fe84068256e7b9d5a64d02aafe6c3501d6e553d39ee9e03597688157ee3f

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