Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e15ceb0845d7592…

MALICIOUS

PDF

80.5 KB Created: 2021-03-29 22:19:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 1c0b55ea146d7d4be20911cb53458c9f SHA-1: 55da049339c60f7e72d9cd92113d70f23e282efc SHA-256: 7e15ceb0845d7592c56e3d1cbe1040a8242c000d938c7e442c905661e844a8f9
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and is identified as a link farm hosted on disposable domains, suggesting a phishing or scam operation. The document body, though heavily obfuscated, contains keywords related to the embedded URLs, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/wix?keyword=coc+mod+apk+2019+ios PDF link annotation
    • https://cdn.sqhk.co/baxoladipezu/jcILChf/33231406380.pdfIn PDF document text
    • http://titujewegefo.iblogger.org/amazon_cloudwatch_user_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/dunuxorigu/pgiQGU9/bakrid_video_song.pdfIn PDF document text
    • https://cdn.sqhk.co/dofexoxev/hjjiggc/dual_screen_wallpaper_windows_10_4k.pdfIn PDF document text
    • http://mgacessoria.online/libepesud0w.pdfIn PDF document text
    • https://cdn.sqhk.co/figesuweno/igijhbV/starcraft_pop_up_camper_canvas_replacement.pdfIn PDF document text
    • https://cdn.sqhk.co/tosobulig/d2cNhd6/flixster_movies_app.pdfIn PDF document text
    • http://ubzvp.com/misesosanoluwobidu113ks.pdfIn PDF document text
    • https://cdn.sqhk.co/vefomatakin/ijfD9gf/venaru.pdfIn PDF document text
    • https://cdn.sqhk.co/feneradebeza/1ihhDjQ/4_function_calculator_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/fafaviwi/igqUgfm/google_analytics_certification_study_guide.pdfIn PDF document text
    • http://epaytds.xyz/what_can_you_eat_while_doing_a_colon_cleansergnt0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/96477187935.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56f6a4a0-b893-4ee1-af82-df5d97170efb/wavosixixuriwemibavaj.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/dragon_booster_theme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5aadfed3-4b4b-4901-8774-08bba1033d7e/96234021480.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca40dca3-f8f6-4159-975c-70f3832ca1eb/narasimha_karumanchi_data_structures_c.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9252fde4-3213-4a47-a190-6ebbd8058cab/12441207557.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/avast_internet_security_2018.pdfIn PDF document text
    • http://gusipeviriw.rf.gd/38936126246.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/780440b5-1b44-4b03-99cb-5b1c4df77114/tone_up_legs_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/kisagoz/twilight_saga_eclipse_full_movie_free_download_720p.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/duxudu.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_off0000f9fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FB 5544 bytes
SHA-256: 47c8a73fd7291d61911bb4c62d01692534c0db714a2cd5fc7efd98c2ff759ff2
font_01_sfnt_off00010cc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC5 11260 bytes
SHA-256: 18ab8dd3fec4a263464cede5132e4dfbe71c691027cde5fba26b6486448cad1c

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