Malicious PDF — malware analysis report

Static analysis result for SHA-256 527079ae6a853e29…

MALICIOUS

PDF

85.1 KB Created: 2021-03-20 19:41:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 474a00c1743d3238f9b0fe7f3940690a SHA-1: 6d07da239fbeb8f1a74ee7226ef924ac8a572224 SHA-256: 527079ae6a853e2938f6eed677e3598903bbf7d7b702980d7671bdec26607d88
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful websites. The primary lure appears to be a "24 month milestones speech" to entice clicks on the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://zajinet.ru/strik?utm_term=24+month+milestones+speech PDF link annotation
    • http://idealica-italy.site/72074186224lyjg4.pdfIn PDF document text
    • https://lomivurusizova.weebly.com/uploads/1/3/4/8/134868764/nurirofepumozitezaz.pdfIn PDF document text
    • http://molotkov.site/xxx_video_playertnyn5.pdfIn PDF document text
    • http://varietystore.website/robadatebpekd.pdfIn PDF document text
    • https://vafukomoruf.weebly.com/uploads/1/3/4/8/134862603/vowoj.pdfIn PDF document text
    • https://wegenagozej.weebly.com/uploads/1/3/5/3/135394478/ae7507f.pdfIn PDF document text
    • https://fubareno.weebly.com/uploads/1/3/1/4/131482864/2d7e1670f0f42d6.pdfIn PDF document text
    • http://hairhome.moscow/when_the_stimulus_intensity_increases_what_changesvrwxk.pdfIn PDF document text
    • http://jilet2.club/39750205743r7cc.pdfIn PDF document text
    • http://vashe-zdorovie.xyz/the_power_of_now_by_eckhart_tolleyz17j.pdfIn PDF document text
    • http://tvoyoproc.fun/86060187221zdfmi.pdfIn PDF document text
    • http://deine-gabe.com/53109148955j894x.pdfIn PDF document text
    • http://grigolia-studio.ru/is_sharp_a_good_tvcfbd3.pdfIn PDF document text
    • https://buxiniti.weebly.com/uploads/1/3/4/3/134309366/4928372.pdfIn PDF document text
    • http://winoorama.fun/10512879857yq6ot.pdfIn PDF document text
    • http://pupofikavize.iblogger.org/61750704158.pdfIn PDF document text
    • http://kawlites.online/buzafagokopijipefuvil3dl5.pdfIn PDF document text
    • http://idealica-columbia.site/59792103570vhg7v.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://be56f97b-0727-4a8e-a141-4155b83e75ac.filesusr.com/ugd/5034d0_cfd95f3f4370410c98dd219153246c9c.pdf?index=trueIn PDF document text
    • https://6b2f37ea-3696-4b87-858b-663c379f6f6f.filesusr.com/ugd/16879a_f28bb34713e54c17a6002888ac27c03c.pdf?index=trueIn PDF document text
    • http://tagetebaj.rf.gd/askep_abortus_imminens.pdfIn PDF document text
    • http://kikasipab.epizy.com/kosotidese.pdfIn PDF document text
    • https://a804c8a8-fdf7-4fba-b19b-c23aecc29597.filesusr.com/ugd/a7074a_67e992c0851a4266bdd5d4b0e891ef2f.pdf?index=trueIn PDF document text
    • http://tokejavopif.rf.gd/bdo_archer_gear_guide_2018.pdfIn PDF document text
    • https://e9155d39-0f7d-4366-9ee8-34e17fe3d773.filesusr.com/ugd/9e05b8_6dc2bc04a3fa49ca992a534af7417c8d.pdf?index=trueIn PDF document text
    • https://e1318bff-d970-45e2-bcea-45481503a18b.filesusr.com/ugd/75a96d_f85a312a57a343899e530f9fd4987a72.pdf?index=trueIn 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_off0000fa71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA71 4992 bytes
SHA-256: 3d175f68d753ae4a1e8375c311ebe1e24c25a3ad651b95f57f96bb190b041b33
font_01_sfnt_off00010b55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B55 11172 bytes
SHA-256: 1d0db846f18702346e1dd8d1dd36ed63a9940a3504ac929dea479a32b00b7f6d
font_02_sfnt_off00013195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13195 16096 bytes
SHA-256: 292b67320f20e7e38814323bff47001ccb55b5eebb397aea8a254f3e91f57b87

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