Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fa14a5c7d41788d…

MALICIOUS

PDF

78.3 KB Created: 2021-05-13 13:48:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: cbb8927be1dc7171139749a2f3f6d8d4 SHA-1: d2cf24ddddd2fadec2c13358e129c9f8c73ebc79 SHA-256: 1fa14a5c7d41788d8f27c6426769b1e388013a1889b9d53bcd1b15bb357cdd16
126 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, and is identified as a link farm. The presence of external URIs and the structure suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://ponafet.ru/strik?utm_term=starbucks+secret+menu+calories PDF link annotation
    • https://sizuzoxoxef.weebly.com/uploads/1/3/4/8/134846633/133176.pdfIn PDF document text
    • http://lodomujimujug.mywebcommunity.org/where_is_the_peroneal_artery_located.pdfIn PDF document text
    • https://jolofoni.weebly.com/uploads/1/3/4/0/134042869/4743059.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370525/normal_5fea0b92d7349.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489058/normal_604cb5b2ce056.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450884/normal_6035fd06246e9.pdfIn PDF document text
    • https://cdn.sqhk.co/bareziwo/jhjLiix/offline_map_and_navigation_app_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/vasozaponem/idiejiE/wall_art_sculptures_for_sale.pdfIn PDF document text
    • http://gadetebes.sportsontheweb.net/can_t_help_falling_in_love_kalimba.pdfIn PDF document text
    • https://bosijoputa.weebly.com/uploads/1/3/4/3/134317673/dobas.pdfIn PDF document text
    • https://lenagalazipanom.weebly.com/uploads/1/3/5/3/135310064/bejujunatigileduzu.pdfIn PDF document text
    • http://tadekurujere.22web.org/el_hombre_como_ser_biopsicosocial.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491925/normal_6025048c3a883.pdfIn PDF document text
    • https://soxoxalumowaju.weebly.com/uploads/1/3/4/7/134768556/50a98df744c6c7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382780/normal_60196cc27fcd1.pdfIn PDF document text
    • https://cdn.sqhk.co/mivadunoxo/igghbZt/fevavituraluxunoloxefu.pdfIn PDF document text
    • https://cdn.sqhk.co/torazanopuni/Gghigyl/gangstar_vegas_world_of_crime_mod_apk_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4028265d-78ac-4fe8-b069-14d3d7c1cad2/qu_es_la_esclerosis_y_cuntos_tipos_hay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6484118e-ff42-40e5-98ff-b4b69573e00e/how_music_got_free_by_stephen_witt.pdfIn PDF document text
    • http://vibodox.rf.gd/82897248987.pdfIn PDF document text
    • http://leperipuf.rf.gd/90344518227.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3c6291e-c65c-4e66-a174-c14f6bd913b3/basic_spanish_grammar_test_amazon.pdfIn PDF document text
    • http://xasebor.rf.gd/48430785809.pdfIn PDF document text
    • http://purezaviwof.myartsonline.com/cancionero_catolico_con_acordes_para_guitarra.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_off0000f207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF207 5252 bytes
SHA-256: 973ea34f976548954f6ceb1e30397d83cdb05a9f7f69748be79f4f07e699b6cd
font_01_sfnt_off000103d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D1 11428 bytes
SHA-256: 978ab84fcb2d035a23d8691f328e1a59de20c4c8ebafdc6a6912be61379f0603

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