Malicious PDF — malware analysis report

Static analysis result for SHA-256 044a7a3fae696645…

MALICIOUS

PDF

118.8 KB Created: 2021-04-02 09:59:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 850988fb4bd49d8294ea78c383a1b21e SHA-1: 28cbac645ab8292f20bf7e02fe916206510839fe SHA-256: 044a7a3fae696645114e885f1bbc73ac3e5796f163be1d87bbeda005bea8a443
194 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download' lure further supports the phishing or malware distribution intent.

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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://seumenha.ru/wix?keyword=few+things+left+unsaid+pdf+download+free PDF link annotation
    • https://mugakosi.weebly.com/uploads/1/3/1/3/131379948/76a720e.pdfIn PDF document text
    • https://lorobewan.weebly.com/uploads/1/3/1/8/131871486/zalejizup-lisudovikazir-lugeteb.pdfIn PDF document text
    • http://tetiviguxawik.getenjoyment.net/ahe_dayamaya_biswa_bihari.pdfIn PDF document text
    • http://sellforce.ru/logo_motion_after_effect_templateagh0w.pdfIn PDF document text
    • https://xijapesulole.weebly.com/uploads/1/3/4/5/134588017/pekizuzut-likunekofup-muzikorazakafet.pdfIn PDF document text
    • http://psylath.com/wogosvfrhz.pdfIn PDF document text
    • https://dedodewoluxo.weebly.com/uploads/1/3/4/4/134402612/5400153.pdfIn PDF document text
    • https://cdn.sqhk.co/mikevoponage/iihadih/40772790122.pdfIn PDF document text
    • http://zoguponuwuxoli.medianewsonline.com/68820321079.pdfIn PDF document text
    • https://gazufapojekivu.weebly.com/uploads/1/3/4/8/134890592/fonisivupevifa.pdfIn PDF document text
    • https://cdn.sqhk.co/govizanorev/9heOqMg/64233836754.pdfIn PDF document text
    • http://subfamjtii.site/870728761145mp67.pdfIn PDF document text
    • http://help-copyrightviolationhelpcenter.com/beyond_enemy_lines_game_downloadun2rk.pdfIn PDF document text
    • http://xomofaki.getenjoyment.net/vivuvovogigoteg.pdfIn PDF document text
    • https://vunisanelebori.weebly.com/uploads/1/3/3/9/133999195/todevebax-gemudurux-vamojiwoj-zawatodekewido.pdfIn PDF document text
    • https://pipabujul.weebly.com/uploads/1/3/2/6/132680817/japosovidififu_fezejo_ruboxumu_rimole.pdfIn PDF document text
    • http://strapslap.online/firekulujepagebim2f0z6.pdfIn PDF document text
    • https://cdn.sqhk.co/noxibogalu/gghgghb/83947472421.pdfIn PDF document text
    • https://bapuporodotuxo.weebly.com/uploads/1/3/1/3/131381531/dapajobejipevipo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/7971b6cd-2c93-4af4-aaa8-0b100cfca54b/66634838623.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c584cac1-88a7-499e-b8eb-cc0e477d9bf3/52254907680.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74a5a2cf-2080-47bf-b1ce-f054f1d636a9/purpose_of_writing_a_reflective_essay.pdfIn PDF document text
    • http://rabelinowizufe.myartsonline.com/fabrication_des_briquettes.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001878c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1878C 5232 bytes
SHA-256: 9ea43592f22f68105cbf82576d7fabcde6ad741e9f6ed57a672567264aed974d
font_01_sfnt_off00019960.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19960 10872 bytes
SHA-256: 9eb5a5d8c43591a4323a6cd7572c61b912b37b5711552188ace16cc46bcc9c06
font_02_sfnt_off0001be92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BE92 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c