Malicious PDF — malware analysis report

Static analysis result for SHA-256 58f297ab82e2b603…

MALICIOUS

PDF

74.8 KB Created: 2021-03-18 14:57:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ddd9960904d0fc802c93f718b6710437 SHA-1: bb6834bb79f1e8dabd13b3a9b295958b96c58352 SHA-256: 58f297ab82e2b603e4f8eacd85e4962b937a05055fcd49bd644670c0a0944738
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ClamAV as a phishing trojan. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, appears to be a lure related to a 'Symantec dlp policy configuration guide', likely intended to trick users into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://mezovuduw.ru/123?utm_term=symantec+dlp+policy+configuration+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4394082/normal_60356dbdc2a07.pdfIn PDF document text
    • http://dipunag.getenjoyment.net/7433233808.pdfIn PDF document text
    • http://nuzarekuzugav.mypressonline.com/how_many_calories_in_a_medium_iced_latte_with_skim_milk_from_dunkin_donuts.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481161/normal_603e6e678b652.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428033/normal_601ff884bd6ee.pdfIn PDF document text
    • https://cdn.sqhk.co/togokitaz/qhjygj4/vebimopa.pdfIn PDF document text
    • https://cdn.sqhk.co/jodariwem/ahbFiei/move_to_ios_app_not_working_transfer_interrupted.pdfIn PDF document text
    • http://bisibometixo.mywebcommunity.org/the_last_of_us_2_trailer_song_ellie.pdfIn PDF document text
    • http://giwitap.getenjoyment.net/le_petit_nicolas_film_netflix.pdfIn PDF document text
    • http://rawoxaxevog.mygamesonline.org/are_mtx_terminators_good.pdfIn PDF document text
    • http://dipenoguzel.sportsontheweb.net/kitchen_interior_design_catalogue.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://rivuwasiwitovud.rf.gd/xemorixeduselokik.pdfIn PDF document text
    • http://ludinezew.rf.gd/spyhunter_5_full_version_with_crack_free_download.pdfIn PDF document text
    • http://pamilov.epizy.com/good_night_wishes_gif_images.pdfIn PDF document text
    • http://bototiluwoge.atwebpages.com/world_map_black_and_white_labeled_printable.pdfIn PDF document text
    • http://pavadujutupa.epizy.com/52492421941.pdfIn PDF document text
    • http://kapowuxivi.atwebpages.com/16383634637.pdfIn PDF document text
    • http://pojisugafini.epizy.com/mathematical_ability_test_questions_and_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD990 5384 bytes
SHA-256: 465d9b03580b0d004edc54f58f2559154eff516db66d1eba45a93ff19e00e40e
font_01_sfnt_off0000ebc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC4 10532 bytes
SHA-256: de43b204990280718f238f6bb97af1b8910bf9dc80f071699fafd5c3619c9146
font_02_sfnt_off00010fbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FBC 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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