Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f3939771b73229c…

MALICIOUS

PDF

73.8 KB Created: 2021-03-23 13:05:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d41c4c5cc10da3c560c9525b5ba03032 SHA-1: 15713f5c038b0e3ccd28d4a08123150fe835b62c SHA-256: 0f3939771b73229cc7de863a583aa62dd96ce886bbb04e8a8846ba7e05410859
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://jumiwimov.ru/123?utm_term=aafco+nutritional+guidelines PDF link annotation
    • http://nososunovurosag.iblogger.org/prsu_b._ed_syllabus.pdfIn PDF document text
    • http://gifazat.iblogger.org/acer_chromebook_15_charger_type_c.pdfIn PDF document text
    • https://cdn.sqhk.co/purorenutuw/emk0hay/71821926264.pdfIn PDF document text
    • https://kesozelakix.weebly.com/uploads/1/3/5/3/135300748/1024af0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490265/normal_604cfe45384ca.pdfIn PDF document text
    • https://jezulusawuse.weebly.com/uploads/1/3/4/0/134000263/nurojor.pdfIn PDF document text
    • http://bankrot-biznes.ru/rivevubizitnjhj.pdfIn PDF document text
    • http://susurrus.space/igcse_maths_formula_bookletxtjhw.pdfIn PDF document text
    • http://dithetsen.xyz/mexican_whiteboy_book_reviewfr6cx.pdfIn PDF document text
    • https://jitolabifu.weebly.com/uploads/1/3/1/6/131607188/3609718.pdfIn PDF document text
    • https://mupaxezofede.weebly.com/uploads/1/3/4/3/134317166/mexavopajetotep-waxageronuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496151/normal_602549415e9b5.pdfIn PDF document text
    • http://maliwalilaz.22web.org/wartime_chocolate_cake.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401540/normal_601ead25a1de0.pdfIn PDF document text
    • http://petrol-v-pol-price.site/best_crossfit_workouts_to_build_strengthx1479.pdfIn PDF document text
    • https://naziwimirup.weebly.com/uploads/1/3/4/3/134371197/nexavonevozibix_sixoduveposo.pdfIn PDF document text
    • https://cdn.sqhk.co/xutazazo/ejihjhb/princess_cruise_ships_sailing_now.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://titomozuluvexov.epizy.com/wamerirobasirebuwodu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a65bc46f-34ff-452e-9ff1-6b5fb7026757/gone_with_the_wind_chapter_2_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac435e85-6472-4b82-96a5-851625426b62/ronevivigesetulirid.pdfIn PDF document text
    • http://gorobibo.epizy.com/ambiguous_genitalia_approach.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_off0000e361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE361 5180 bytes
SHA-256: d17d392a31e85e295c34f408a4fd43d258fd01723cbfe395d20939a580dc7f02
font_01_sfnt_off0000f50b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50B 10848 bytes
SHA-256: da77317acb54bd1f6730b1602695a52bc0183e6bb0c0a41d547d7e845c58828d

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