Malicious PDF — malware analysis report

Static analysis result for SHA-256 2088c890648a42bb…

MALICIOUS

PDF

80.4 KB Created: 2021-03-10 14:02:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: cf25db870ae893384438fe6b7a8dffc2 SHA-1: 28cd872301d5bc388e1720a245f1313723d3532c SHA-256: 2088c890648a42bba7107bcfa28fd358251e6a983e89019f89db086f5637b014
246 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 Malicious Link T1059.007 JavaScript

This PDF file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of both credential phishing and a link farm. It impersonates brands like Facebook and contains numerous external links, many hosted on disposable domains, directing users to potentially harmful content. The presence of external URIs and link farm heuristics strongly suggests an intent to redirect users to malicious websites for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://jowozulabu.weebly.com/uploads/1/3/4/0/134013075/c7a1becd921d1c3.pdf.
  • 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/wix?keyword=ragnarok+tactics+class+guide PDF link annotation
    • http://komarovskii.xyz/xibumepakenobowidilosudepouq3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454432/normal_5ff5ad0b9f810.pdfIn PDF document text
    • http://baugroup.info/wubategigakaras2jct.pdfIn PDF document text
    • http://pofuxubilet.sportsontheweb.net/kevogozekos.pdfIn PDF document text
    • http://sowipilarow.mygamesonline.org/how_much_does_a_baldwin_baby_grand_piano_cost.pdfIn PDF document text
    • http://maslovauto.ru/epochenbersicht_deutsch_abitur098fq.pdfIn PDF document text
    • https://jowozulabu.weebly.com/uploads/1/3/4/0/134013075/c7a1becd921d1c3.pdfIn PDF document text
    • https://pegogelixuj.weebly.com/uploads/1/3/0/8/130813965/guzilenabujono-wigukifobib.pdfIn PDF document text
    • http://dawezedelofeda.scienceontheweb.net/12700493924.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383475/normal_6040ae98cd02a.pdfIn PDF document text
    • https://jibukosixej.weebly.com/uploads/1/3/4/0/134018053/541176.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422148/normal_601778fb53031.pdfIn PDF document text
    • http://derilezin.sportsontheweb.net/talebupapekebovofuv.pdfIn PDF document text
    • https://xidamosu.weebly.com/uploads/1/3/4/7/134707329/gapisizazasitel_xabexojimo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404980/normal_60193777719a3.pdfIn PDF document text
    • https://tajaxaxiko.weebly.com/uploads/1/3/0/9/130969751/755473bb4eb4.pdfIn PDF document text
    • https://jadotonevuwupu.weebly.com/uploads/1/3/1/4/131407011/4654657.pdfIn PDF document text
    • https://wokugosag.weebly.com/uploads/1/3/4/3/134339956/komomavawurego.pdfIn PDF document text
    • https://pixerogamaba.weebly.com/uploads/1/3/1/8/131871590/nuwafeku.pdfIn PDF document text
    • https://mifevulesitiz.weebly.com/uploads/1/3/5/3/135321383/vowuloviz.pdfIn PDF document text
    • http://xofelivigavas.mywebcommunity.org/candyland_board_game_rules.pdfIn PDF document text
    • https://tojaxufuvubugo.weebly.com/uploads/1/3/4/6/134641466/nejodovonineta.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lewinozed.atwebpages.com/weka_tutorial_java.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE773 5180 bytes
SHA-256: 723c4c2b5554331563596d215f892efe537c4a833f0853e39bea130f3a2ead42
font_01_sfnt_off0000f929.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF929 10716 bytes
SHA-256: 66e77cc10d33e7db32654dd4b235e69f7c21b1a98ebcbad7d32191ff079eb28b
font_02_sfnt_off00011d5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D5C 16092 bytes
SHA-256: 9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2