Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca04f604b236507c…

MALICIOUS

PDF

110.8 KB Created: 2021-03-23 06:49:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 491a3bbe19beff6feb6c400732b57a02 SHA-1: d69988daac097967ad6e5d4751217ed56dc0c03d SHA-256: ca04f604b236507c55ea10fa18c33e05f54bd3f3114558f7b325b0138003fb96
186 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and a machine learning model assigned a high probability of maliciousness. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content or phishing sites. The presence of embedded JavaScript, though not fully analyzed, further supports the potential for malicious activity such as payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://midufefew.ru/strik?utm_term=how+to+cook+vegetables+on+a+george+foreman+grill PDF link annotation
    • https://cdn.sqhk.co/xamitarerivu/G9hbPod/brawls_of_steel_apk_download.pdfIn PDF document text
    • https://vozuviwugil.weebly.com/uploads/1/3/2/6/132681927/wigusek_gunuladidew_wazezomi.pdfIn PDF document text
    • http://glossywp.online/unlimited_power_by_anthony_robbins_free_downloadv39tf.pdfIn PDF document text
    • https://pasadaxadug.weebly.com/uploads/1/3/5/3/135390708/wudivozeguka.pdfIn PDF document text
    • https://cdn.sqhk.co/dulinifijal/jeVtpgf/mermaid_photo_booth_backdrop.pdfIn PDF document text
    • http://znakomstva69.space/956441211690qgye.pdfIn PDF document text
    • https://xowimigijik.weebly.com/uploads/1/3/1/6/131637135/33e194d0c702.pdfIn PDF document text
    • http://jijuduli.mywebcommunity.org/soroxulumiruxukus.pdfIn PDF document text
    • http://jolijivik.scienceontheweb.net/attack_on_titan_season_3_op_2.pdfIn PDF document text
    • https://cdn.sqhk.co/xakurusuk/Pihgehh/turn_off_data_roaming_notification_moto_z.pdfIn PDF document text
    • http://dfwshootersupply.com/ruger_p95_extractor_issuesgk1za.pdfIn PDF document text
    • https://wiwamimojuwat.weebly.com/uploads/1/3/0/8/130813692/3000628.pdfIn PDF document text
    • https://vonizimawat.weebly.com/uploads/1/3/4/3/134385064/pimosabiniko_bivoba_towemomenolij_romonadoka.pdfIn PDF document text
    • http://circulyarkadigital.xyz/body_for_life_approved_foods06ggu.pdfIn PDF document text
    • https://cdn.sqhk.co/kapimetavis/XqqWmgj/speaker_wire_cover.pdfIn PDF document text
    • https://gewaxuselez.weebly.com/uploads/1/3/4/2/134265722/varipubusome.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d497f082-4895-42de-a72c-038d9367c8a3.filesusr.com/ugd/8e727b_157284f5a8d144dda653a163f440e69a.pdf?index=trueIn PDF document text
    • http://gutekuretejapoj.onlinewebshop.net/all_chemistry_formulas_download.pdfIn PDF document text
    • https://cdd249b8-77b1-4a94-b024-8995efe4d959.filesusr.com/ugd/d394ff_095dfbdbf18d4386977c2c0ac199f869.pdf?index=trueIn PDF document text
    • http://japinoxizidunub.myartsonline.com/majevixodagixotipurus.pdfIn PDF document text
    • http://wufikemofumop.atwebpages.com/jajuwubutunifarufinirulif.pdfIn PDF document text
    • https://8dac4d01-2cd1-45d2-8b5f-6005f802adc9.filesusr.com/ugd/1f96ce_39ac767f35b3414d9c3fc960b632f61d.pdf?index=trueIn 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_off0001757c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1757C 5520 bytes
SHA-256: e4121ef31c785af3db4d70bec69ac9a96283882892e3397d730fccd09e2f9f75
font_01_sfnt_off00018849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18849 10840 bytes
SHA-256: 95aa8c8ca3531979400dd1bb042ee8bf7091985c730ab65b852d8267530e9515