Malicious PDF — malware analysis report

Static analysis result for SHA-256 43dcb6cace4e59c6…

MALICIOUS

PDF

85.1 KB Created: 2021-03-04 06:04:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 92eff75254dabdf2cde9fd3e46d58fa9 SHA-1: 1e3e5522db1cd42bdcccc311ce944505aed1319b SHA-256: 43dcb6cace4e59c6ac9d03b94e6728c4a9da048783b70e8d6f73e8226e937c27
126 Risk Score

Malware Insights

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

The PDF contains an external URI pointing to a suspicious domain, identified as a link farm on disposable hosting. ClamAV detected this file as Pdf.Phishing.Trojan, and an ML classifier also flagged it as malicious. The document body, though heavily obfuscated, appears to be a lure related to generator information, likely intended to direct users to the malicious URL for a phishing or malware-dropping purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vilenefex.ru/123?utm_term=what+is+the+smallest+3+phase+generator PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4421049/normal_5ffc0ca732c87.pdfIn PDF document text
    • https://cdn.sqhk.co/xubupigegi/zfhbajj/flight_club_new_york_sneaker_store.pdfIn PDF document text
    • http://life50it.pro/2058303835622s4t.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417834/normal_5ff2ac3320108.pdfIn PDF document text
    • http://fotubobuwenapu.scienceontheweb.net/samsung_50_inch_crystal_uhd_4k_smart_tv_reviews.pdfIn PDF document text
    • http://fafijitesulexiz.mygamesonline.org/which_is_an_example_of_classical_conditioning.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492600/normal_60308bf0d1687.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377380/normal_5fe836c58a662.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407664/normal_60281fa833e0d.pdfIn PDF document text
    • https://cdn.sqhk.co/zedawuzijis/igtszCi/the_homeless_gospel_choir_merch_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/dojagomudek/adjajdQ/zakelumif.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383165/normal_5fdf711d26453.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370052/normal_5fd15a396c779.pdfIn PDF document text
    • http://videohost.space/kokunonokuvudakiximusi6zudk.pdfIn PDF document text
    • https://cdn.sqhk.co/motanunika/OoYjc5e/juvapotuzowunuvusere.pdfIn PDF document text
    • https://cdn.sqhk.co/nivipanevi/fLgjEjg/pitunirivepevajubugola.pdfIn PDF document text
    • http://opensoda.pro/6456163716222j05.pdfIn PDF document text
    • https://cdn.sqhk.co/loxexafetivu/lbjaHwc/pexikesodebe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473954/normal_5fd91ac61e950.pdfIn PDF document text
    • http:///\\\/twitter.com\\\/GeneratorsDirec\,\icon\:\icon-twitter\,\title\:\Twitter\},\Pinterest\:{\href\:\http:///\\\/pinterest.com\\\/generatorsdirec\\\/\,\icon\:\icon-In PDF document text
    • http:///\/www.bbb.org\/chicago\/business-reviews\/industrial-equipment-and-supplies\/power-In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rolubumemetujin.atwebpages.com/camp_chef_smokepro_se_pellet_grill_cover.pdfIn PDF document text
    • http://nivuzujanux.myartsonline.com/ffxi_ninja_solo_leveling_guide.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_off00010a0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A0D 5408 bytes
SHA-256: 8cdfef3f2004c3adc0680fda02ce51ea3c65bc6bf844758347e38caff6c62fad
font_01_sfnt_off00011c56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C56 12848 bytes
SHA-256: 4ce796a84607df51660c407f9a1abaeae38bfe43b49ff23e3000bf6231e251e3

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