Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bd61beecdacb2f7…

MALICIOUS

PDF

75.0 KB Created: 2021-02-24 21:30:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 81be72ebe5e98adf1686c0830926ac54 SHA-1: 20ee0c7f0ce96a42a73df14d84e3a183dbbe4275 SHA-256: 7bd61beecdacb2f74a159feb64ff3ed5006905b912218d9ae57ef099340d857d
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links that redirect to known malicious domains and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=did+the+princess+chose+the+lady+or+the+tiger In PDF document text
    • http://vezerfa.xyz/mcat_practice_test_with_answers7e0bq.pdfIn PDF document text
    • http://winoxolupuvil.getenjoyment.net/network_support_interview_questions_and_answers_for_l1_level.pdfIn PDF document text
    • https://cdn.sqhk.co/gagupibi/Eyifgid/dry_ice_blasting_rental_toronto.pdfIn PDF document text
    • http://subbellassecret.com/why_does_my_ge_washer_not_drainl1l8g.pdfIn PDF document text
    • https://cdn.sqhk.co/zasemewiti/HKthPgf/fate_of_racing_furious_8_netflix.pdfIn PDF document text
    • http://komaxinatobofe.medianewsonline.com/novederidamukikusevakufa.pdfIn PDF document text
    • https://cdn.sqhk.co/tumupowe/ezO3EOu/52996304147.pdfIn PDF document text
    • http://dosijefa.mypressonline.com/wijorawidoxe.pdfIn PDF document text
    • https://cdn.sqhk.co/wepurodapike/fgdhjTr/94860139832.pdfIn PDF document text
    • http://instapriz24.site/watchman_nee_sermonsv71py.pdfIn PDF document text
    • https://cdn.sqhk.co/nopusixinid/hdibgcY/switched_at_birth_cast_mingo.pdfIn PDF document text
    • http://wiwurike.iblogger.org/enchanting_crafting_guide_minecraft.pdfIn PDF document text
    • http://test123test.xyz/kojewatokowafodc3w56.pdfIn PDF document text
    • http://bomaduworofa.medianewsonline.com/density_calculations_practice_worksheet_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/lojeliju/6ZhdF27/86908643384.pdfIn PDF document text
    • https://cdn.sqhk.co/punipopi/iiuCVid/master_crafting_and_building_apk.pdfIn PDF document text
    • http://busotokebos.iblogger.org/a_full_movie_free.pdfIn PDF document text
    • http://meweremidef.iblogger.org/81189707132.pdfIn PDF document text
    • https://cdn.sqhk.co/gudijupimeb/eX4nQjb/kufikukejebadogaba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/aristotle_categories_chart.pdfIn PDF document text
    • http://figifikasiwaw.epizy.com/giwilef.pdfIn PDF document text
    • http://bifajone.rf.gd/fategapagasinolatuf.pdfIn PDF document text
    • https://s3.amazonaws.com/lemerisinivum/84546394404.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/xajagevipufisun.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_off0000e738.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE738 5436 bytes
SHA-256: 28a69661db6e97d6a3be2d86cc4b84f776198e49dc941a5598b3a75f5a390e1b
font_01_sfnt_off0000f9be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BE 10784 bytes
SHA-256: b0070de6835b604127d70e8c4fb5de14bd7a97ad9630892265cb8cb1c43bac43

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