Malicious PDF — malware analysis report

Static analysis result for SHA-256 29f51d845a764fb5…

MALICIOUS

PDF

72.9 KB Created: 2021-06-01 07:45:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 6738b070530c199545807a00ccb53afa SHA-1: af11c64c4a47ccb6ff4321cd29be77350c2600f4 SHA-256: 29f51d845a764fb588139012a484e71f12e0f1e9495e875e1892b732c681d5f6
194 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing or malware distribution lure, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. The presence of numerous external links, including one pointing to 'https://huntic.ru/pbw?utm_term=how+to+download+gta+ppsspp+android', suggests an attempt to redirect users to malicious content. The ML classifier and ClamAV detection further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://huntic.ru/pbw?utm_term=how+to+download+gta+ppsspp+android PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4443619/normal_60082bb5ace30.pdfIn PDF document text
    • https://keboxineb.weebly.com/uploads/1/3/0/9/130969034/b99da03ee18.pdfIn PDF document text
    • https://lopuradusat.weebly.com/uploads/1/3/5/2/135297354/d806a315e5a.pdfIn PDF document text
    • https://daxozeke.weebly.com/uploads/1/3/4/3/134322415/4561e02074.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476288/normal_5fffe91e97de2.pdfIn PDF document text
    • https://sujebufapu.weebly.com/uploads/1/3/1/3/131379792/5a214e39.pdfIn PDF document text
    • https://pewewikivu.weebly.com/uploads/1/3/5/3/135302390/fuligirukafebi_vilarufunilelor_rejivumogejum.pdfIn PDF document text
    • https://lodunuvivilaz.weebly.com/uploads/1/3/0/7/130775731/zenigoxilo_welewupe_pakakiwavuv_jawox.pdfIn PDF document text
    • https://dezusopivelisuk.weebly.com/uploads/1/3/4/7/134734284/wurifunirivefe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497687/normal_6032324b85be6.pdfIn PDF document text
    • https://lokamafurixese.weebly.com/uploads/1/3/4/5/134509290/4109474.pdfIn PDF document text
    • https://nuzosobife.weebly.com/uploads/1/3/4/7/134734795/8a58418.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414173/normal_605422f30325d.pdfIn PDF document text
    • https://rofaxebawo.weebly.com/uploads/1/3/4/7/134750080/buwomowijikore.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485434/normal_5fd8b60d6874c.pdfIn PDF document text
    • https://pozufijuxib.weebly.com/uploads/1/3/0/7/130775557/cef614db13e6eda.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lekuzax.pbworks.com/f/fojevekemetenusurideko.pdfIn PDF document text
    • http://zepupifob.pbworks.com/f/sepuretaxikuwogo.pdfIn PDF document text
    • http://muxopal.pbworks.com/f/brawl_stars_mod_apk_v_14._118_download.pdfIn PDF document text
    • http://zowonixepor.pbworks.com/w/file/fetch/144440019/zotejuropofidolozese.pdfIn PDF document text
    • http://barumena.pbworks.com/f/13129196791.pdfIn PDF document text
    • http://tisowowuduwe.pbworks.com/f/cules_son_los_beneficios_de_tomar_cloruro_de_magnesio.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF61 5180 bytes
SHA-256: e26f07e9888b39e8e586fe9e60c09687798b4d78808bcc979943bf8e1689b897
font_01_sfnt_off0000f121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF121 11160 bytes
SHA-256: 57de3182dd47f7b091544c49e01b013068d3a3755affb74755c996cf86888183