Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9dce28ee97f3a42…

MALICIOUS

PDF

76.7 KB Created: 2021-05-16 14:58:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 2b918a6bd20c858ce03958bcd73e0401 SHA-1: 7bbe73f49948e1748ddab8ae579574615e438614 SHA-256: f9dce28ee97f3a42cabf8665fdfc70efbb7494058da62491472ca9c37ecff427
66 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and employing UTM parameters, indicative of a link farm designed to redirect users to malicious content. The ML classifier strongly flagged this PDF as malicious, and the heuristic analysis identified it as a link farm on disposable hosting. While no scripts were extracted, the structure and embedded URLs suggest an attempt to drive traffic to potentially malicious sites, likely as part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • 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/strik?utm_term=pakistan+law+dictionary+free+download+pdf PDF link annotation
    • http://pinegobojefo.getenjoyment.net/gubiterisowegokazafeja.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448330/normal_5ff832b922c03.pdfIn PDF document text
    • http://usblighter24.site/chocolate_girl_song_kannadaqwyvm.pdfIn PDF document text
    • http://likedizar.medianewsonline.com/18345430120.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470524/normal_6031d52695283.pdfIn PDF document text
    • http://harkateine.fun/shadow_and_bone_review_indonesiaox7bk.pdfIn PDF document text
    • http://xejopegig.mypressonline.com/arcsoft_showbiz_5_free_download.pdfIn PDF document text
    • http://nobirejajatit.iblogger.org/animal_planet_documentary.pdfIn PDF document text
    • http://pepopaguwanutet.22web.org/kunawomora.pdfIn PDF document text
    • http://ellmax-site.xyz/pofiseyktiv.pdfIn PDF document text
    • http://koxudizujan.mywebcommunity.org/ecological_diversity.pdfIn PDF document text
    • http://fullstacket.online/competency_evaluation_reporttzpqe.pdfIn PDF document text
    • http://zozifufo.22web.org/third_eye_opening_book.pdfIn PDF document text
    • http://tozofuji.scienceontheweb.net/ela_common_core_standards_grade_6_practice_test.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370273/normal_5fdc4805bd081.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zapivevo.epizy.com/kesoguronedinofujipurufa.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/85173024140.pdfIn PDF document text
    • http://kalasoziluxolim.myartsonline.com/xifabutekarexezaj.pdfIn PDF document text
    • http://zexamimese.rf.gd/kokoxa.pdfIn PDF document text
    • http://wovuluvoju.onlinewebshop.net/60126616338.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/telecharger_bein_sport_live_android.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/little_shop_of_horrors_plant_audrey.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/gabugiviverepipugizivu.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_off0000e9cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CD 5408 bytes
SHA-256: 6b14ed842260641ace45ce24fbad4886c85db211df9eb90f3858179fa4e5aeea
font_01_sfnt_off0000fc60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC60 12152 bytes
SHA-256: 7e7479853cd78be1777460c6f9976a0223bad20c6e405e06671e014958b24a1a

Open this report in the interactive analyzer, or submit your own file for analysis.