Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fcb3d6d14346fa0…

MALICIOUS

PDF

84.9 KB Created: 2021-03-25 12:09:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3912bdd07ce1b60dc5ab401ac5e064fc SHA-1: b0c09dcc789586587b2128b731e625de10a4797d SHA-256: 7fcb3d6d14346fa040d7129cb8d731ab124313833653228181ff068a8a29a230
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to exploit users via web redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://resalured.ru/strik?utm_term=sas+ods+pdf+header
    • http://forecast.bet/9476236862w2zh3.pdf
    • http://design-kvartira.info/nekajubajosuvwgo1.pdf
    • http://forpost-electrica.ru/osmosis_and_diffusion_review_sheet_answer_keysvna1.pdf
    • http://koreanluxe.com/tadogigowatujiv8kq.pdf
    • http://temppicture.xyz/pajifikinowubezivoziwasb8pb.pdf
    • http://trenolgia.buzz/enlace_sigma_y_enlace_pi4eg7d.pdf
    • http://bumadodari.iblogger.org/53536738878.pdf
    • http://marafonsport.site/67854373859mjsf6.pdf
    • http://virona.org/inflammatory_bowel_disease_pathology_report5d3zq.pdf
    • http://poboxabirukus.iblogger.org/bajovujutifoguvikux.pdf
    • http://keepxufi.space/bounty_hunter_2016_movie_freedt4cf.pdf
    • http://thecabinets.xyz/3066460250xyqt3.pdf
    • http://fherixq.com/96559520108hxj7y.pdf
    • http://cherrypimp.online/ideal_problem_solving_model_bransford_and_steini2q4g.pdf
    • http://crispyset.online/25625616471to77z.pdf
    • http://dithetsen.xyz/aramaic_english_dictionaryj44k2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cabae152-0d18-4cc7-9545-8711a89e332e.filesusr.com/ugd/607e04_a1c2f6fb7ff54f63a4614983bd987719.pdf?index=true
    • https://be56f97b-0727-4a8e-a141-4155b83e75ac.filesusr.com/ugd/5034d0_ec26bb48e54e49d6ba7f0aedca5e4e60.pdf?index=true
    • https://d4f1f58f-bd44-402a-a4b0-a3aa01e36dbf.filesusr.com/ugd/dffefa_dd77b0845fcf484088c6bd18cd2fc3e6.pdf?index=true
    • https://s3.amazonaws.com/wujixus/77173384157.pdf
    • https://7b4e975e-109f-4397-a679-93e438ff1453.filesusr.com/ugd/c33f71_bec7845d2ed24d7fa2628127c1904b33.pdf?index=true
    • https://c1bbde11-5cda-4f7c-8b74-b2fe90b484f5.filesusr.com/ugd/1c8c6c_b425e269831f4116a97cab704ee3241a.pdf?index=true
    • http://xaxelajifamukas.rf.gd/drummond_company_balance_sheet.pdf
    • http://lulikeleweworup.epizy.com/introduce_yourself_interview_answer_sample.pdf
    • https://s3.amazonaws.com/bufexa/51323899426.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001029a.bin
84c9d2549cd4cc09dd50ae405c19c594a4b92e7827269838236ab9598f3b31de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1029A 4756 bytes
font_01_sfnt_off000112c1.bin
6a397841b257a3ae2508af0a23135e2be8cf94d4b6a71997002a54bc21884933		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112C1 10768 bytes
font_02_sfnt_off000137ad.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x137AD 4324 bytes

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