Malicious PDF — malware analysis report

Static analysis result for SHA-256 43e832fe819263c8…

MALICIOUS

PDF

100.4 KB Created: 2021-05-31 14:52:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 337380943eadeab62a509350ff5637f1 SHA-1: de1feb7daa4e697de6455df4eba6a2069ccd9cf0 SHA-256: 43e832fe819263c81f846351bcb9f97720b8824a0bff8d83ab6776ebd6028bff
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • 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.
  • 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=pokemon+mega+evolution+aquamarine+cheat+codes PDF link annotation
    • https://wafumaxa.weebly.com/uploads/1/3/5/4/135400811/dagijaxux-wuluxiwu-lajomowizojex-sixesobolola.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374984/normal_606e8f0b9b7db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373301/normal_605ac7538148f.pdfIn PDF document text
    • https://sutafufig.weebly.com/uploads/1/3/4/4/134402916/lerokanaw.pdfIn PDF document text
    • https://nanopimage.weebly.com/uploads/1/3/1/3/131398258/8028504.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416929/normal_5ff184bb51644.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414672/normal_602f567002703.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381738/normal_5ffd295a5529b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376601/normal_602b02743a29d.pdfIn PDF document text
    • https://zibefaxad.weebly.com/uploads/1/3/4/5/134594794/girevijubixiju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421627/normal_601a66c28be20.pdfIn PDF document text
    • https://vuwapelenepaje.weebly.com/uploads/1/3/4/7/134705438/remokozulas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473640/normal_5feca041a1e60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403543/normal_601f2cb3298cd.pdfIn PDF document text
    • https://bojumojomugo.weebly.com/uploads/1/3/4/8/134850871/dumaluwazobat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452392/normal_5fd5f56d6f63a.pdfIn PDF document text
    • https://zexunipubu.weebly.com/uploads/1/3/4/8/134877105/28def62.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369164/normal_5ffb201984dd9.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/557f9437-0629-4467-9b94-e55aa8892764/the_last_exorcism_2010_full_movie_download_in_hindi_filmyzilla.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6625577-aaea-4a17-b7ac-0fc5561053a7/xozawiwewakolov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2f6bda5-179f-423a-93fd-f8ad93a45569/guvagakunimesetefunani.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a014cda5-f66f-4821-8c74-3e59700c0f9b/beatles_yesterday_violin_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e896256-e6ce-490d-bf98-423177864d13/honda_rebel_cmx_250_single_carburetor.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000126e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126E8 5604 bytes
SHA-256: 62fc839023b8a7d4ff9455630ed723c9cc6cd36b503bd385003df3fd7446cd96
font_01_sfnt_off000139c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139C5 1728 bytes
SHA-256: 02c2c02a54d41e4a9f22719aaa7986c6cb657a03979a9935defd730e8c07db3f
font_02_sfnt_off00014266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14266 12832 bytes
SHA-256: 82ac5085c9008369fa66d6464a996036348d4c881735a429b08ac5fe10117272
font_03_sfnt_off00016bd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BD7 16196 bytes
SHA-256: 536551dee6876366cf8a5d925709f0aaa9c9f58e9963f4e154d0e8cf77de6ee3