Malicious PDF — malware analysis report

Static analysis result for SHA-256 e60934ab37260ab1…

MALICIOUS

PDF

77.8 KB Created: 2021-03-24 16:46:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd39a4832ec1d241d56361d107dec2aa SHA-1: 25274bf9ae67d53d3de3aa868b924b0ecd384715 SHA-256: e60934ab37260ab1fd14b0e5a89af5fa31903ff53f0ac4d634a6ba577f002de1
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicative of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/123?utm_term=formal+casual+outfits+for+guys
    • http://d2-club.ru/52093271743rz9ds.pdf
    • http://mipefukonuvav.iblogger.org/sukirijojogosuvepabu.pdf
    • https://cdn.sqhk.co/vonofuguniti/0nHwRRD/business_strategy_definition_dictionary.pdf
    • http://copriyghtconfirmed.com/1725485163dd8n9.pdf
    • https://cdn.sqhk.co/zovitamojim/jUMifFM/21194644820.pdf
    • http://pupijepu.22web.org/balesiwukikon.pdf
    • http://nebemor.mywebcommunity.org/walgreens_blood_pressure_monitor_coupon.pdf
    • http://xuroriwonufuz.scienceontheweb.net/20806043169.pdf
    • http://damenetapep.iblogger.org/nitirabuduzajiwu.pdf
    • https://cdn.sqhk.co/ropobemuma/h24gfvD/xonufigofoxevaresu.pdf
    • https://cdn.sqhk.co/vemudumuxixu/zhdu9hJ/highway_bike_traffic_drive_in_marked_lane.pdf
    • https://cdn.sqhk.co/raxuzuvuluf/JOvjabM/96810982240.pdf
    • http://modernstyle.pro/what_continent_is_the_daintree_rainforest_inpp6bd.pdf
    • http://vuxetexab.22web.org/lagifegatif.pdf
    • http://worldthailand.fun/300635822957z0jj.pdf
    • http://pe50off.pro/fumaxotezinjt2w8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://12c21f6a-324e-488c-af83-7e1076049286.filesusr.com/ugd/e84f25_6d417171bb42403da3fc20031f8d249e.pdf?index=true
    • http://benamow.myartsonline.com/research_methods_in_agricultural_extension.pdf
    • https://238a82c5-85a8-4641-a991-2f0f5270ddc4.filesusr.com/ugd/63f22d_9a277ef9abae41f4994c2f9b3cd8cbc6.pdf?index=true
    • http://likutolejit.onlinewebshop.net/wix_oil_filter_for_2007_honda_civic.pdf
    • https://2f60c0de-bae8-48d8-8f3f-ce7907f87c52.filesusr.com/ugd/badafb_3cbb4b4ac0ee4be28e1b973d9787fa7b.pdf?index=true
    • http://fekepoloper.rf.gd/4208870528.pdf
    • http://liraperuwuw.atwebpages.com/83654406829.pdf
    • https://d5aacb37-8766-4234-9cc8-c2ec3b911aba.filesusr.com/ugd/1e723b_2908ffeb32fb4f7c8fa331662fcbccdb.pdf?index=true
    • https://006b50d4-ad2a-4261-8279-34542eb0d7b0.filesusr.com/ugd/a640e9_33154a77526f4087b6b7572706e24df2.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3fe.bin
e313ab59b1bd7c59ce22116d9502a9cc26006c1942313586fbab043dcbbacf26		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FE 5256 bytes
font_01_sfnt_off000105d1.bin
e2d9f50905f478e9af26acd3f3adaee697434f93171b76840ce4b9d0871b85d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105D1 10544 bytes

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