Malicious PDF — malware analysis report

Static analysis result for SHA-256 46c44bc73068e44b…

MALICIOUS

PDF

80.0 KB Created: 2021-04-06 00:37:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: e57a82026efa3a1360d27312bceba30e SHA-1: 5f636a5bc797038d8c306aa4a24da2f095161255 SHA-256: 46c44bc73068e44b5f201064eef0d71b44c77044810d510dab46df9083b866fb
194 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains, indicative of a link farm used for phishing or malware distribution. The heuristic 'SE_INVOICE_LURE' suggests the document's content is designed to trick users into clicking these links. While no scripts were explicitly extracted, the PDF structure and the presence of many external URIs strongly suggest it's designed to redirect users to malicious content, likely a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/wix?keyword=falcon+squad+hacks PDF link annotation
    • http://opensol.xyz/46680326200na8xd.pdfIn PDF document text
    • https://cdn.sqhk.co/xanuramalu/jhjicgi/56551913167.pdfIn PDF document text
    • https://cdn.sqhk.co/futogifoku/XtiajeM/retroviruses_contain_the_enzyme.pdfIn PDF document text
    • http://pifofobexaxel.mypressonline.com/arduino_nano_programming.pdfIn PDF document text
    • https://cdn.sqhk.co/lajawawinu/jgihgKI/92430017189.pdfIn PDF document text
    • http://vir-tus.com/295161729518bc7q.pdfIn PDF document text
    • http://kakafeg.scienceontheweb.net/towemixavurunemutuboz.pdfIn PDF document text
    • https://cdn.sqhk.co/bigulikexupa/j1cNijN/doodle_run_mod_apk_download.pdfIn PDF document text
    • http://bezprovodov.guru/hansel_and_gretel_movie_1987_where_was_it_filmedzkcum.pdfIn PDF document text
    • https://cdn.sqhk.co/fusunejevawu/hjg9cpV/xaxapufagelixa.pdfIn PDF document text
    • https://cdn.sqhk.co/moturalogupe/MHBejdv/60366171124.pdfIn PDF document text
    • http://lovelid.xyz/150586572623sdb8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://katibabiziv.epizy.com/leboliligumaru.pdfIn PDF document text
    • https://87deab66-c645-46c6-955a-dbc2758d34a6.filesusr.com/ugd/302fc9_4cecc3b47545441ca53d674581233041.pdf?index=trueIn PDF document text
    • http://gulizut.epizy.com/zenofesogumibagakaz.pdfIn PDF document text
    • https://9ef77391-fdd1-48d8-ba15-364b07375333.filesusr.com/ugd/ebefdf_8ce7662b610b4dafb7e8ee710eb8bbe2.pdf?index=trueIn PDF document text
    • http://muvekalufisu.atwebpages.com/life_cycle_of_ascomycota.pdfIn PDF document text
    • http://nujugeteteda.myartsonline.com/sat_2_books_free_download.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f27f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27F 4712 bytes
SHA-256: 8baa56d2be53a82863e962ab85f4afd9a2b5db7d64fa64a2850e835f8a6fb73c
font_01_sfnt_off0001025f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1025F 10052 bytes
SHA-256: ba6df6d58eea93b346f22b4a4b1b97dce2b83f849f5c229858f022326ab9ba99
font_02_sfnt_off000124ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124AE 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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