Malicious PDF — malware analysis report

Static analysis result for SHA-256 32f06af7af616a4f…

MALICIOUS

PDF

79.8 KB Created: 2021-04-23 03:53:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa78c0373a7b59b902d429552c37ec0c SHA-1: e054500fee3e912dcea72f5c3f0d673e529c761a SHA-256: 32f06af7af616a4f50f927cce2d8b217a10dfc0d747cd8becc7a085af0630b53
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of numerous external URIs, including one pointing to 'bologen.ru', suggests a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains a title related to food dishes, likely serving as a lure to encourage users to click the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/strik?utm_term=which+food+dishes+are+popular+in+south+india
    • https://static.s123-cdn-static.com/uploads/4455657/normal_5fe57e7266c67.pdf
    • http://cancandance.org/sliced_bread_store_chillicothe_mobrvf5.pdf
    • http://dejamorije.scienceontheweb.net/alimentos_ricos_en_fosforo_y_potasio.pdf
    • http://gutagige.sportsontheweb.net/fozofawij.pdf
    • http://mainsale.info/bakewokulufizivob5iavo.pdf
    • https://cdn.sqhk.co/lukulobu/hfUjcqL/dejanefa.pdf
    • https://cdn.sqhk.co/kuruwoke/gejc5mW/guwexejirizoribilepusil.pdf
    • https://cdn-cms.f-static.net/uploads/4461249/normal_6066023416474.pdf
    • https://cdn-cms.f-static.net/uploads/4370528/normal_606a6b5650111.pdf
    • http://menegatuje.iblogger.org/kapidasamobazetujigup.pdf
    • http://fapasevusiledap.mygamesonline.org/lisukepi.pdf
    • http://jiwabozaxexe.mypressonline.com/cgegis_table_2020_17.pdf
    • https://cdn-cms.f-static.net/uploads/4370088/normal_605996ebcd1dd.pdf
    • https://cdn-cms.f-static.net/uploads/4446643/normal_601db39b65e67.pdf
    • https://cdn.sqhk.co/rikopekela/gcfic4I/wopesodojepejiso.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tivusanezidiv.rf.gd/niwamegokifej.pdf
    • https://s3.amazonaws.com/setikizo/scholastic_aptitude_test_questions_with_answers.pdf
    • https://s3.amazonaws.com/jiwotarotavuz/excel_features_built_in_preprogrammed_formulas_called.pdf
    • http://tunogamux.rf.gd/aristoteles_politica.pdf
    • http://gukutimaguvuzum.onlinewebshop.net/33209507798.pdf
    • https://s3.amazonaws.com/betefowubevat/ar_15_scopes_4x.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8e5.bin
0fa7c330fd440452b17f21331bf4d60ce1b129fbd522763510ad26fc3e715a6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E5 5256 bytes
font_01_sfnt_off00010ad6.bin
a307640d84b19b337766ffe9c62fad6f0d2122224f1e4a4dfe155026e9b73074		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD6 11440 bytes

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