Malicious PDF — malware analysis report

Static analysis result for SHA-256 db6692752934c29c…

MALICIOUS

PDF

97.4 KB Created: 2021-03-19 06:51:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: e0f665c592a79dc6be30a9212bd15797 SHA-1: ea64dcf621250072fd603a5c12b0a003bf7023c4 SHA-256: db6692752934c29c1118d66cfe8ac93c4f8c087552b1691fc5ac6edf610695c1
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, specifically as a phishing trojan. It contains numerous embedded URLs, with one identified as a link farm on disposable hosting, suggesting an attempt to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/award?keyword=appiani+maneuver+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413848/normal_601645da263cb.pdfIn PDF document text
    • http://gopidap.scienceontheweb.net/zesifapumulajorujuwuwidav.pdfIn PDF document text
    • http://getepitisux.mywebcommunity.org/particle_physics_lab_links.pdfIn PDF document text
    • http://netopodimamo.mywebcommunity.org/38275647109.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374983/normal_6036966f2cbea.pdfIn PDF document text
    • http://zevibeponakat.getenjoyment.net/brother_p-touch_p900w_treiber.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369162/normal_604952a4d8ce8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387821/normal_6027223d70711.pdfIn PDF document text
    • http://fuzubijixulux.mygamesonline.org/jixesuxufebatulowizafiven.pdfIn PDF document text
    • http://jetavof.sportsontheweb.net/adeptus_custodes_vk.pdfIn PDF document text
    • http://kofodotig.sportsontheweb.net/87535941463.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bijoxiwakofavoj.epizy.com/what_to_do_in_grand_staircase_escalante.pdfIn PDF document text
    • http://litorow.myartsonline.com/38393037345.pdfIn PDF document text
    • http://nedolekom.rf.gd/jirufulokinixevijufesako.pdfIn PDF document text
    • http://renirujetumofid.epizy.com/memu_android_emulator_offline_installer.pdfIn PDF document text
    • http://mekamaxabojumoz.epizy.com/debussy_preludes_book_2_sheet_music.pdfIn PDF document text
    • http://tosurok.myartsonline.com/anterior_pelvic_tilt_fix.pdfIn PDF document text
    • http://mogegan.epizy.com/pikagabirunawukosaremodub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9de23651-99bb-4d0e-83d4-283e0da83272/how_to_use_symbolism_in_writing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d977c16a-3867-4c85-b61c-51b178eaf6a7/how_did_the_triple_entente_win_ww1.pdfIn PDF document text
    • http://wonumamirevaz.rf.gd/batot.pdfIn PDF document text
    • http://sonisan.epizy.com/lebatu.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_off00014270.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14270 5024 bytes
SHA-256: ee7bce9e30fd606035b07a4fa4a45fb65f55017cba2ddf10e97125d83995e8c1
font_01_sfnt_off0001537d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1537D 10788 bytes
SHA-256: 446717893d170e3ca2c1b80e44e6d826e906ce059b05672ebee8e6fab7a293b3

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