Malicious PDF — malware analysis report

Static analysis result for SHA-256 f80da0f9f3beed11…

MALICIOUS

PDF

110.1 KB Created: 2021-03-22 18:20:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 9ccb32ad6318ed5b3a1fbe169f4c2c6a SHA-1: a6753b835c87ecd19471084670a669573d933149 SHA-256: f80da0f9f3beed117c3f408123e73ea4a6af09b24f9a11de7cfa932260364fa7
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are indicative of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are commonly used to host malicious content or redirect to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/wix?keyword=2.4.3+enhancement+shaman+pvp+guide PDF link annotation
    • http://dofujifeluradep.medianewsonline.com/ms_excel_2020_assignments_for_students.pdfIn PDF document text
    • http://buylettersonline.com/wopibobotopijotucxobg.pdfIn PDF document text
    • http://goods-amzon.com/php_mvc_tutorialzckqh.pdfIn PDF document text
    • http://salea.site/fowost5yl3.pdfIn PDF document text
    • https://cdn.sqhk.co/dudumadopole/jc9HEgj/zukefenemadifofugoxal.pdfIn PDF document text
    • https://cdn.sqhk.co/xopuxuvop/hnlTTWu/61145106188.pdfIn PDF document text
    • https://cdn.sqhk.co/noneniwetav/jjj4ia5/potafol.pdfIn PDF document text
    • https://cdn.sqhk.co/dudumadopole/egcR9jc/plinko_master_apple.pdfIn PDF document text
    • https://cdn.sqhk.co/kajutizikodu/jwhdgcz/ropudufijekezelabog.pdfIn PDF document text
    • https://cdn.sqhk.co/relulapezele/gfiiifc/pinball_heroes_psp_review.pdfIn PDF document text
    • https://cdn.sqhk.co/febapaji/IjiojbK/fr_legends_car_mod_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/navozaxezini/jhggfji/fokojo.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvazilu/ihAjaAo/south_africa_interim_constitution.pdfIn PDF document text
    • https://cdn.sqhk.co/mibemofega/aZxjihi/20212151878.pdfIn PDF document text
    • https://cdn.sqhk.co/xubewarow/Mjc0iiF/soccer_laws_of_the_game_test_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/xixujipum/dMGjfhj/worst_game_ever_reading_comprehension.pdfIn PDF document text
    • https://cdn.sqhk.co/ragebobeb/siigjjc/business_administration_books_online_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bodegifu.atwebpages.com/jibapotuwevosa.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/game_pokemon_terbaik_android.pdfIn PDF document text
    • http://suvalomimo.atwebpages.com/13374126636.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/euro_truck_simulator_2_crack_free_download_for_pc.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_off00016ff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FF9 5740 bytes
SHA-256: 9182fa043feb9bf222bb5b60fc1dd148d082919eec627e52cb042f09128bac10
font_01_sfnt_off00018378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18378 10900 bytes
SHA-256: dc8ca233a15e9031191a4ac8164e8f4e4d9a33e29010f3aa5ba53c685f76a80f

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