Malicious PDF — malware analysis report

Static analysis result for SHA-256 d88c3f5d792d696e…

MALICIOUS

PDF

84.5 KB Created: 2021-03-16 10:07:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22bfa1154ec858c1fabaab70e93bb09c SHA-1: 9f760e548d8169c3daf7c50b0e5671b7833c771b SHA-256: d88c3f5d792d696e1c8d6553c2c0dd500806adefb9198e2550bcd3901917c524
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL pointing to a suspicious domain ('xezojetit.ru') and another to a PDF file hosted on AWS. The 'PDF_SEO_LINK_FARM' heuristic indicates a large number of generated links, suggesting a tactic to increase visibility or distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/123?utm_term=airbnb+property+management+agreement+template
    • http://kogutojoveso.mywebcommunity.org/84105535998.pdf
    • http://lilubaxubaxulu.sportsontheweb.net/88995419317.pdf
    • https://kasikijafeke.weebly.com/uploads/1/3/1/4/131406722/df26b4d5b.pdf
    • https://fuxiwajusefu.weebly.com/uploads/1/3/4/6/134617271/kolenilamudezukalena.pdf
    • http://bobiruropiles.22web.org/maine_pyar_kiya_film_songs_free.pdf
    • https://pimobepasad.weebly.com/uploads/1/3/5/3/135347335/9909044.pdf
    • https://muwalivom.weebly.com/uploads/1/3/2/6/132695892/belarixufedi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/woxorojero/vipupalajepadifotope.pdf
    • https://2489a575-72f7-492f-b117-28cfe4a4d2a3.filesusr.com/ugd/d81705_7da550badade4ddb9b66076de0a3b45f.pdf?index=true
    • https://368051e9-4199-40ea-b9a2-dc6e6f83cb3b.filesusr.com/ugd/6260fe_3fd1e5f59a794ae3ab732bf04f38327a.pdf?index=true
    • https://0e9c393c-9feb-4465-ae9d-4486bea7a644.filesusr.com/ugd/4b68be_50e71e93521b4cc1978a3b67f0b83761.pdf?index=true
    • https://03df18d0-0a94-4077-8b44-1f3cf8b7c870.filesusr.com/ugd/23a6c3_1a617cd084f54f92b67bc1a44afe0956.pdf?index=true
    • http://kosirokuki.epizy.com/creation_story_colouring_sheet.pdf
    • https://6b54b0b2-91db-43cc-88c8-bbc4f7e20b37.filesusr.com/ugd/a773aa_66fe597103d74323be3ad1b99e5ef0f4.pdf?index=true
    • http://joxugodeluda.rf.gd/58225439593.pdf
    • https://6e7ef639-f89a-4701-86f9-710a836f1183.filesusr.com/ugd/12745a_86aaeae291e442cd9a2097a5bbe14792.pdf?index=true
    • https://1a899ca6-11bf-4464-971e-4bf0b885e765.filesusr.com/ugd/4ac3ff_adbe498036f64177bd8ea185736a9faa.pdf?index=true
    • https://8c56b32b-3398-45d6-9c0b-b55146621f16.filesusr.com/ugd/6924eb_6b7b6900551848a6a5bac7a194648b23.pdf?index=true
    • http://gitogopafo.epizy.com/milulobab.pdf
    • https://2a983b51-2e13-4971-8c1f-a5bca3ab4353.filesusr.com/ugd/e1a791_e0817ef7834c4fc0a190b40397c33ecd.pdf?index=true
    • http://wejufutaz.onlinewebshop.net/basic_biblical_hebrew_grammar.pdf
    • http://vexabimumemig.atwebpages.com/what_happens_on_a_day_of_national_mourning.pdf
    • http://manosotidokef.myartsonline.com/kivakaveguta.pdf
    • https://s3.amazonaws.com/zalisujezajaje/how_do_you_troubleshoot_a_whirlpool_cabrio_dryer.pdf
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100a0.bin
4968f07a1a029555a3f49cc5856eba15e5b13e341f84b248e3113b3c2b9c6b52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100A0 4980 bytes
font_01_sfnt_off00011168.bin
faaa177fa1f9052864042368471cdec673e7cb453be19c2f527200cf1d30da3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11168 10792 bytes
font_02_sfnt_off00013616.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13616 4324 bytes

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