Malicious PDF — malware analysis report

Static analysis result for SHA-256 49d1f9c10a91cc6b…

MALICIOUS

PDF

89.6 KB Created: 2021-03-15 07:17:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 078cf1ff6532bbb9dc09a2c1d2c77b33 SHA-1: dceb00cdf9314fe4d60ce7dd9121498c42178fef SHA-256: 49d1f9c10a91cc6bd955d00a4c021530fc83e3c784321320460476e748ec3362
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous embedded URLs, with one prominent example being https://druttle.ru/wix?keyword=cosco+car+seat+manual+online, suggesting a lure to external malicious content. The document body, though heavily obfuscated, appears to contain metadata related to its creation, further supporting its role as a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://druttle.ru/wix?keyword=cosco+car+seat+manual+online PDF link annotation
    • https://cdn.sqhk.co/doporaba/igw37ig/top_100_nursery_rhymes_video.pdfIn PDF document text
    • https://cdn.sqhk.co/fesoxuleri/iijgjhJ/dj_song_mixer_app_for_pc.pdfIn PDF document text
    • http://sodowetan.mywebcommunity.org/miwoliwetidixibabalaf.pdfIn PDF document text
    • http://tumbochka.space/what_is_latent_heat_of_fusion_definitionjd5eo.pdfIn PDF document text
    • http://getliterate.online/lajadipofokanozodomupgg9ar.pdfIn PDF document text
    • http://avtovishki-msk.ru/elixir_of_life_little_alchemyo6680.pdfIn PDF document text
    • http://esclick.pro/solving_quadratic_equations_by_factoring_quiz3e073.pdfIn PDF document text
    • http://physcoo.com/i_am_number_four_book_free_downloadvaemp.pdfIn PDF document text
    • http://movawizaxaxato.mywebcommunity.org/16420231729.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/hd3cdhf/68157338215.pdfIn PDF document text
    • http://xexogafuko.22web.org/93803124434.pdfIn PDF document text
    • http://meriline.store/tevegupowagidaxobumuxoz0a7b2.pdfIn PDF document text
    • http://jikusofare.mywebcommunity.org/40151993805.pdfIn PDF document text
    • http://ruvenebigolusep.mywebcommunity.org/kepijesomageba.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://gumusimigogasuz.onlinewebshop.net/toxoplasma_life_cycle.pdfIn PDF document text
    • http://pegesij.rf.gd/86740590064.pdfIn PDF document text
    • https://d4bcd744-2348-4fe3-9006-05b2fcbd3cbd.filesusr.com/ugd/704566_152bd0875deb49458048335b95eaabbf.pdf?index=trueIn PDF document text
    • http://gixuzako.rf.gd/26513162545.pdfIn PDF document text
    • https://0cc2a7d0-6f33-4335-9ec9-554d9418487e.filesusr.com/ugd/cb4a18_d2e3a068d673429ba9d9bade3965f136.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11508 4848 bytes
SHA-256: d4952bcc91a68cddf4501c35a0175700b95162532a03a5b352faea0db0f130d8
font_01_sfnt_off00012562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12562 11192 bytes
SHA-256: 76f016af3cc89abadb4f592272c14b8ec182595960f89e5eae7f201c13146da9
font_02_sfnt_off00014b7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B7E 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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