Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d950bbf403aa253…

MALICIOUS

PDF

85.2 KB Created: 2021-05-11 11:05:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 8747020face5407fa80e862fa0ef0af7 SHA-1: 05552810fbd9fb966aa84f40ee2cdfae976b4c8a SHA-256: 3d950bbf403aa253638d107152678e86dd9a50a7dfcf55f136bf8968aaf8336b
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URLs, with one prominent URL leading to a domain associated with a search term for 'iphone ipod price in pakistan', suggesting a phishing lure. The PDF structure also indicates it functions as a link farm, directing users to various potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://pelibifir.ru/strik?utm_term=iphone+ipod+price+in+pakistan PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4500438/normal_6036a64066b75.pdfIn PDF document text
    • http://gojovujewinunuj.mygamesonline.org/sample_formal_letter_asking_for_permission.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481155/normal_5fdd2787d51cf.pdfIn PDF document text
    • http://beststudent.space/gavivikarufasubopoppnjiq.pdfIn PDF document text
    • http://hairsprof.ru/35991002112tmjah.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410443/normal_604a754d7bfde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381321/normal_60112877901c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471253/normal_6034e1bb84bd8.pdfIn PDF document text
    • http://gizesodawesiv.mywebcommunity.org/renakefodopi.pdfIn PDF document text
    • http://geniusenglish.space/rizinojiqao73.pdfIn PDF document text
    • http://xabusiwidurej.22web.org/how_much_does_a_shoe_stretcher_cost.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422645/normal_60333fd3465a6.pdfIn PDF document text
    • http://help-verifiedbadgecenter.com/chagrin_river_steelhead_fishing_reportjz33a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368501/normal_604d9e25aa856.pdfIn PDF document text
    • http://snail-case.store/how_to_setup_my_netgear_n600_wireless_dual_band_router00fps.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496812/normal_602179f38fe39.pdfIn PDF document text
    • http://nebatomefov.scienceontheweb.net/95332543085.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381973/normal_6064c113677cc.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/b88ad0e5-9036-44a8-bebe-5279f6a8e2d1/why_wont_my_bostitch_nail_gun_work.pdfIn PDF document text
    • http://voronuxo.epizy.com/25799307643.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e81e35c5-1053-4f57-a8da-8e463b49e192/watch_salems_lot_1979_free_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ae1fdb6-2319-4107-aa64-3ac55f799835/el_conde_de_montecristo_pelicula_gerard_depardieu_reparto.pdfIn PDF document text
    • http://somasetowijo.myartsonline.com/2317262622.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b901aa90-a4ca-4d1a-86ec-7e393d78dd1c/singer_profinish_serger_needles.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2F 5132 bytes
SHA-256: 88ad58a88094a5f7aeede92aeacb5d588a8d3c5d23fa1ad5d5a94565cea841c5
font_01_sfnt_off00010b9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B9B 11292 bytes
SHA-256: a3a745fd6cd150a7c75e0f9f1c53ce54fef77858160e45e552c8ad592bce180b
font_02_sfnt_off00013237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13237 16060 bytes
SHA-256: 503f5200e83b189a546b6c6e1d808633a9135186956fe76ff9bd78de3d91e3c6