Malicious PDF — malware analysis report

Static analysis result for SHA-256 78a49784a1452a72…

MALICIOUS

PDF

80.9 KB Created: 2021-03-18 09:45:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: abb2addf89077f16db98494c1b4311a0 SHA-1: b5e7ea9d2271a330ee3a2f5874fd6fc47809b456 SHA-256: 78a49784a1452a720b6ec8ffec5f350437d0bcfbd03036b34bc570eadc7926ce
96 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 an embedded URI pointing to a suspicious domain, 'ponafet.ru', which is likely used to host a malicious payload or redirect users to a phishing site. The document body, though partially corrupted, suggests a lure related to a book review, aligning with common social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/strik?utm_term=cazadores+de+sombras+ciudad+de+hueso+libro+rese%25C3%25B1a
    • https://static.s123-cdn-static.com/uploads/4369161/normal_600967e128f52.pdf
    • http://nubuxeki.scienceontheweb.net/78121543914.pdf
    • https://cdn-cms.f-static.net/uploads/4414678/normal_6022c9df8b914.pdf
    • https://cdn-cms.f-static.net/uploads/4455390/normal_603808d330c64.pdf
    • http://pemutoguxo.66ghz.com/fomumas.pdf
    • https://cdn-cms.f-static.net/uploads/4426813/normal_602fe0cdb4b68.pdf
    • http://nizavevorupuj.mywebcommunity.org/how_to_sketch_a_rose_easy.pdf
    • http://ravigimojamel.mypressonline.com/cg_police_syllabus_2020_download.pdf
    • https://cdn-cms.f-static.net/uploads/4417037/normal_601d6200a91f7.pdf
    • https://lilonukile.weebly.com/uploads/1/3/4/7/134767916/mosupeseka.pdf
    • https://cdn-cms.f-static.net/uploads/4394079/normal_601324120706b.pdf
    • https://fukobararusi.weebly.com/uploads/1/3/4/4/134404541/suziwodus.pdf
    • https://static.s123-cdn-static.com/uploads/4445337/normal_5ffd3b7f0ee90.pdf
    • https://jelebemurufipo.weebly.com/uploads/1/3/4/4/134442628/5464799.pdf
    • https://cdn-cms.f-static.net/uploads/4386333/normal_6039de1a57f97.pdf
    • https://vadutebo.weebly.com/uploads/1/3/4/8/134889136/revesovut.pdf
    • https://cdn-cms.f-static.net/uploads/4416326/normal_602b994cc0222.pdf
    • http://povulofi.mywebcommunity.org/99011386108.pdf
    • https://tirotirow.weebly.com/uploads/1/3/1/3/131380420/6b3bd8f0d778422.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wilaroxu.atwebpages.com/humminbird_fish_finder_speed_sensor.pdf
    • http://xofiketur.rf.gd/79604062958.pdf
    • https://uploads.strikinglycdn.com/files/672f4531-64e1-403c-a86f-3873a0df58ed/votuwexokaxeru.pdf
    • https://uploads.strikinglycdn.com/files/6bf31912-9f00-4388-a4e3-655f207a690c/should_student_body_president_be_capitalized.pdf
    • http://wafugid.epizy.com/the_oresteia_eumenides.pdf
    • https://uploads.strikinglycdn.com/files/6682dc1b-2f49-4e19-9046-fb998b4c3636/how_to_use_lg_top_load_fully_automatic_washing_machine.pdf
    • https://uploads.strikinglycdn.com/files/33c76351-092c-4647-b40f-03f27977b4b0/wutojotavisosakevigetelul.pdf
    • http://musubokem.rf.gd/zadaviwiriroribesuwel.pdf
    • http://nupuzasig.epizy.com/basement_car_park_design_guide.pdf
    • 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_off0000fc67.bin
e2dfa145075a81bbf5e7fa9fbd579567ea723eaefe9ab713635787e049f1da51		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC67 5488 bytes
font_01_sfnt_off00010ea1.bin
02383c3675d474834558acaaa4a64d7af175f25de027f4de514af142f880d9f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA1 12000 bytes

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