Malicious PDF — malware analysis report

Static analysis result for SHA-256 f42a225e1d6262a9…

MALICIOUS

PDF

108.2 KB Created: 2021-03-02 06:04:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 503ed7a79863e200ebe8eb2df712917e SHA-1: 1bfe11b594fb1ea92654296c948870626d4c18b4 SHA-256: f42a225e1d6262a99f70b36a565d28aea385d44093682cf5818517b50a075429
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, suggesting a link farm or phishing attempt. The embedded URLs and the nature of the heuristics indicate a likely attempt to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://kuzutuzo.ru/123?utm_term=365+days+of+journal+prompts+2020 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4501998/normal_6000c57a1b1f9.pdfIn PDF document text
    • http://vvd.bar/purivuwituwulegara9vip4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427529/normal_6031389eb4cd6.pdfIn PDF document text
    • https://zupikadi.weebly.com/uploads/1/3/4/6/134667234/521753f9e604.pdfIn PDF document text
    • https://tivofexogi.weebly.com/uploads/1/3/1/3/131398075/zikofedewimobib-bokojuzir.pdfIn PDF document text
    • http://zarabotok.space/tewepujivijizagpi5z.pdfIn PDF document text
    • http://dovulup.iblogger.org/rupobimagewowisiwon.pdfIn PDF document text
    • https://sokirokesavosa.weebly.com/uploads/1/3/4/9/134901907/351fae6f8b144.pdfIn PDF document text
    • https://muvuvudu.weebly.com/uploads/1/3/5/3/135351086/f964cc.pdfIn PDF document text
    • http://ver-alex.website/busiruluponodagarozugofoxpmaa0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412895/normal_5fdd728e38054.pdfIn PDF document text
    • https://kefuvarunif.weebly.com/uploads/1/3/0/7/130739830/2160617.pdfIn PDF document text
    • https://buwigare.weebly.com/uploads/1/3/5/3/135308802/5882672.pdfIn PDF document text
    • https://bubebozozuj.weebly.com/uploads/1/3/1/8/131871643/fedezusuz_gapexowipuje_popuxoxa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384167/normal_5fe766a3527b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463559/normal_5febeb874ff8d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369317/normal_5fc930d635319.pdfIn PDF document text
    • https://zukuvexoxowi.weebly.com/uploads/1/3/4/5/134597017/bowifiguxejeg.pdfIn PDF document text
    • https://xudinenudomojuv.weebly.com/uploads/1/3/4/3/134356320/tunuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427504/normal_5fdbcae064eb0.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
    • http://nosijatigatu.epizy.com/98070434259.pdfIn PDF document text
    • http://dakunexafabeve.epizy.com/6718848248.pdfIn PDF document text
    • http://buxusemi.epizy.com/fosuvekomowagetudalavewu.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_off00015838.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15838 5700 bytes
SHA-256: b181d04581db09b48ec71f1c0d1756bfb14c9ec5a31b74f1fcdfb316ef8d2269
font_01_sfnt_off00016b86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B86 11672 bytes
SHA-256: d6a629d2fb3d95630b2e1890cbb2ba24a6b044ad185d39f9b508601e64cfba50
font_02_sfnt_off000192c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x192C2 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c