Malicious PDF — malware analysis report

Static analysis result for SHA-256 3007708fd8def40f…

MALICIOUS

PDF

79.7 KB Created: 2021-02-25 19:07:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 35547e8be0901c54ca8119e823fbdeb8 SHA-1: ff2bcab47d2395a1deb762856fb2a7187b360004 SHA-256: 3007708fd8def40f3e9955f63e01e60445d641956150c65cb84515e9d4463874
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting a phishing or malware distribution scheme. The presence of external URIs and the overall structure strongly indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/wb?keyword=is%20saitama%20the%20strongest%20anime%20character%20ever PDF link annotation
    • http://lomigakorak.getenjoyment.net/dadovotafuroso.pdfIn PDF document text
    • https://cdn.sqhk.co/kowetitemaro/hajbzP6/89281305911.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376404/normal_601ef6a7377cc.pdfIn PDF document text
    • https://pexajutamog.weebly.com/uploads/1/3/4/7/134759810/9122984.pdfIn PDF document text
    • https://xekuvezenigut.weebly.com/uploads/1/3/5/3/135346982/4293140.pdfIn PDF document text
    • http://barajofa.mywebcommunity.org/cocina_criolla_carmen_valldejuli.pdfIn PDF document text
    • https://nijuvijoz.weebly.com/uploads/1/3/1/4/131408832/wovapimudul.pdfIn PDF document text
    • https://cdn.sqhk.co/lepavenujal/oEfIgg4/tachyon_vpn_iphone.pdfIn PDF document text
    • http://rexevivejegox.scienceontheweb.net/nizetuzagosibuwagegevuxo.pdfIn PDF document text
    • http://kojazunupetip.mygamesonline.org/love_dare_book_free.pdfIn PDF document text
    • https://cdn.sqhk.co/bepemuno/ccgiAia/simple_business_accounting_software_for_mac.pdfIn PDF document text
    • https://cdn.sqhk.co/kewixoretuze/zShgjjh/cinemark_brasil_park_shopping.pdfIn PDF document text
    • http://lajodibibodi.getenjoyment.net/wideluferid.pdfIn PDF document text
    • https://rugibabolunape.weebly.com/uploads/1/3/1/4/131454120/tabinavajuzon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zudupaxub.myartsonline.com/harry_potter_half_blood_prince_drinking_game.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/the_falling_man_picture_sequence.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/avery_template_5260_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/rosary_for_the_dead_in_chamorro.pdfIn PDF document text
    • http://duvodix.myartsonline.com/divuwanobak.pdfIn PDF document text
    • http://zudupaxub.myartsonline.com/47135855574.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/63510851781.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_off0000fc79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC79 5180 bytes
SHA-256: a73bc3c0e556bf72229e40258dd015f02a97c6b448268c8cdd91bad96cd0f330
font_01_sfnt_off00010df5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF5 10324 bytes
SHA-256: f990de5aa21988153e1f1814168f36dcf5c18ceea1725b7059cb5d355a915425

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