Malicious PDF — malware analysis report

Static analysis result for SHA-256 faec394c3da7798e…

MALICIOUS

PDF

85.1 KB Created: 2021-02-28 19:40:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 506bef2278467fb654e24db7707a6971 SHA-1: 8e000065b5b9d6c2a0fbb75632a09cabdd344a01 SHA-256: faec394c3da7798efd9bb4579deac64bca291fb8227240127c6db89c02c6ce11
126 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing lure. The document body, though heavily garbled, contains fragments related to downloading music, which could be a pretext for directing users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://fokemale.ru/123?utm_term=descargar+m%25C3%25BAsica+mp3+gratis+para+celular+mp3xd PDF link annotation
    • http://libertinemodels.com/personal_development_plan_for_workn6owv.pdfIn PDF document text
    • http://helplnstagramcontact6088756.com/levenirizilorutawwu8zf.pdfIn PDF document text
    • https://cdn.sqhk.co/bivuwusim/jciaIhf/sevuloj.pdfIn PDF document text
    • https://cdn.sqhk.co/kowalaxu/Njbhda9/15608279192.pdfIn PDF document text
    • http://fofiwafajelerax.sportsontheweb.net/41569743617.pdfIn PDF document text
    • https://cdn.sqhk.co/rigizisojix/jfceRts/virtual_piano_keyboard_with_songs.pdfIn PDF document text
    • http://im-marceting.site/the_five_love_languages_amazon_uksnniu.pdfIn PDF document text
    • https://cdn.sqhk.co/bamosabubesi/Hjd9LuB/stickman_ninja_game_download_old.pdfIn PDF document text
    • https://cdn.sqhk.co/gasariba/iChfb09/business_calendar_2021.pdfIn PDF document text
    • https://cdn.sqhk.co/pegiridireva/G4haWge/lededasimaza.pdfIn PDF document text
    • http://powajaxib.medianewsonline.com/why_does_my_big_buddy_heater_keep_shutting_off.pdfIn PDF document text
    • http://bcpzonasegurape2-viabcp.com/18027884298ockjk.pdfIn PDF document text
    • https://cdn.sqhk.co/xejoverol/pNie0ij/classic_cars_for_sale_near_me_under_10000.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwonesi/gifx8hc/65243424906.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/dorulusof/82818179445.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF90 5740 bytes
SHA-256: 43ff2a7b02907b949f0b27bc2d2c2d3dce5f14ba81f0596168f5218c95f6eb91
font_01_sfnt_off0000f2d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D1 2216 bytes
SHA-256: d780f4bba6b8e08faa0a4c098f672809ff0fd59e08a38c6e5a2277341320f8d2
font_02_sfnt_off0000fce0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE0 13536 bytes
SHA-256: b75a006f26f6050cca1b9060ea44859f4a39816a46cff278829b078f423247dd
font_03_sfnt_off00012745.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12745 16160 bytes
SHA-256: f3085529152d3bd3d76f504047f7f789657acc8f4760bfcdd758464d316adb07
font_04_sfnt_off00013c52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C52 1736 bytes
SHA-256: 5095ccdfdd328c3f25b1766e9c65bca58fa839170fcb9f3db3c20e130d955aff

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