Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb44a8fccf2bd3f0…

MALICIOUS

PDF

86.4 KB Created: 2021-04-06 02:53:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1638d5a07f2a065bc8ad806eca64667f SHA-1: 7d424ef7eefdceeb0b3026de5da1cf79d21d1d9a SHA-256: eb44a8fccf2bd3f0e9bc6b9438df451790e844c9425ed6ea50c0edeb6c4499e0
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing attempt. ClamAV detected this as Pdf.Phishing.Trojan, and ML classification strongly supports maliciousness. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 6

  • 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.
  • 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://dafemum.ru/aws?utm_term=what+are+four+economic+indicators
    • http://my-favshopg.online/mustang_gt_5.0_auto_vs_manualv3qk0.pdf
    • http://feludekinopotas.scienceontheweb.net/metabolism_of_amino_acids_and_proteins.pdf
    • http://jumpfs.space/biruledalijulogewakapr0dli.pdf
    • http://zukirudon.mypressonline.com/20823564024.pdf
    • https://vozoduxi.weebly.com/uploads/1/3/2/8/132815828/833135.pdf
    • http://remont-pc.website/356074206558ia6d.pdf
    • https://maselevajaf.weebly.com/uploads/1/3/1/3/131398143/5f975005d.pdf
    • https://lirobepofuneve.weebly.com/uploads/1/3/0/7/130740173/bemuluzomuzebesebob.pdf
    • https://zonozedu.weebly.com/uploads/1/3/0/8/130874021/vadefedipa-xarunoj-vanapavijokoja.pdf
    • https://toxupuxuforiri.weebly.com/uploads/1/3/5/9/135966975/xodogidivevasam.pdf
    • https://xasigali.weebly.com/uploads/1/3/4/3/134363336/1e16788d47ad3.pdf
    • http://zesenadozefut.sportsontheweb.net/phonics_and_phonetics.pdf
    • http://boothattendant.com/79269220315xlp4n.pdf
    • http://sks-expertiza.ru/36_questions_musical_endingeegqj.pdf
    • https://siputewebototab.weebly.com/uploads/1/3/4/4/134480832/xurunanu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xipawiwakob.rf.gd/93428452991.pdf
    • http://pejefovad.epizy.com/antiquities_of_the_jews_by_flavius_josephus.pdf
    • https://c4a0f302-b060-43a0-af10-a0364da5eca7.filesusr.com/ugd/c6d327_8c8709fa2e0444cdb8c46539b7f393f6.pdf?index=true
    • http://samesesodore.onlinewebshop.net/wazisak.pdf
    • https://183df7f2-4185-4ca0-bfcc-33b39bc842f1.filesusr.com/ugd/9ac34a_cfbd39db96fb4c37a5c87a2089dd8921.pdf?index=true
    • http://dobaferuw.epizy.com/vixorefidekadavu.pdf
    • http://gorefoverotiw.epizy.com/gekodep.pdf
    • https://377d1c6c-8747-407e-9a0d-bb8234813250.filesusr.com/ugd/f0b1fd_8e9ca2ff5d90413b9a6be719d7f52eff.pdf?index=true
    • http://fafaxuz.epizy.com/78058228553.pdf
    • http://vakizonozajaxe.onlinewebshop.net/pobojobuk.pdf
    • https://3d3b31fc-6152-41c7-b1d4-a4af3afcce63.filesusr.com/ugd/3f8d85_94a6710716404b329cd77076fba38945.pdf?index=true
    • https://44879a12-c10a-431c-a98a-7de142752d0f.filesusr.com/ugd/bb4607_5312339573ee4d729508ccf8a41a2855.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000113b5.bin
52be826cb464a3366fc8e53ba5a7184fc6ca526e0cde48057c0b305c26dfceae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113B5 5244 bytes
font_01_sfnt_off00012569.bin
002d0dc4db3732ea3b08f4178af1101e3cfbbe47006972e40cf24854a44400a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12569 11144 bytes

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