Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0b4d2bb25005952…

MALICIOUS

PDF

79.4 KB Created: 2021-02-27 01:47:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: cca2ff61bc02549d70d4f1c114c8c19a SHA-1: b45f531f209621d1590654d90feb930476311fc1 SHA-256: e0b4d2bb250059528322e37b5420b48e5e8eb13d32357de2ba7d0911b70c5725
134 Risk Score

Malware Insights

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

The sample is a PDF document identified as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of a 'download button' lure indicate a phishing or scam attempt. While no scripts were explicitly extracted, the nature of the embedded URLs and the overall structure strongly suggest an attempt to trick users into downloading further malware or visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://bologen.ru/strik?utm_term=the+hunger+games+2014+full+movie+download+in+hindi+720p PDF link annotation
    • http://fexuvukenix.22web.org/46437459451.pdfIn PDF document text
    • http://lusivemewuza.22web.org/lasidiziz.pdfIn PDF document text
    • https://tufelonidozuwux.weebly.com/uploads/1/3/2/6/132681512/wadup_devukon_paworibufis_nakigugebute.pdfIn PDF document text
    • https://zupuluduwiwafop.weebly.com/uploads/1/3/2/6/132681460/1980726.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475866/normal_5fd6395a8f32a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366029/normal_60223efdec4b6.pdfIn PDF document text
    • https://vidiwubiref.weebly.com/uploads/1/3/0/8/130874646/4283013.pdfIn PDF document text
    • https://fudegedetet.weebly.com/uploads/1/3/4/7/134733785/vinavubotaruzuporafa.pdfIn PDF document text
    • http://vogeposekuxav.66ghz.com/17082700800.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424400/normal_5fc897cc8cf2b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452626/normal_600363f188de1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485010/normal_601b026960646.pdfIn PDF document text
    • http://pugumatinudozid.iblogger.org/58426482556.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470211/normal_60186d627044c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421613/normal_5fe75d9964971.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://sudusolupuf.epizy.com/61560541501.pdfIn PDF document text
    • http://jopanitovoxa.epizy.com/bezejamuvixurepasifinet.pdfIn PDF document text
    • http://sivigowukom.epizy.com/nancy_drew_recap_episode_6.pdfIn PDF document text
    • http://mijikabetabup.rf.gd/atmega328p_ic_datasheet.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_off0000e94f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE94F 5852 bytes
SHA-256: 54f61a11e899b5c60266c73f616ad3e6a61380c45712b03b03e7c15cbcc5eccf
font_01_sfnt_off0000fd26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD26 10628 bytes
SHA-256: aab1658c228717c4246c21e4a3425888cec544840f1598a2b134ef1a74e47539
font_02_sfnt_off000121a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121A0 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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