Malicious PDF — malware analysis report

Static analysis result for SHA-256 6443a6d547ec91c7…

MALICIOUS

PDF

88.1 KB Created: 2021-03-21 09:57:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d0493004634c95cdd5d821d84697e576 SHA-1: 5d0741768e380b78b10b97ce0d579ed0cf0363a2 SHA-256: 6443a6d547ec91c7119a04cfd3810cf3bf94e91ea72c710bd59f098afdb16193
126 Risk Score

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 0.9991

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
  • 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://fokemale.ru/strik?utm_term=why+is+a+deed+of+covenant+required PDF link annotation
    • http://tekirivira.iblogger.org/boena_kropka_pokonaj_alergi.pdfIn PDF document text
    • https://burufazifefep.weebly.com/uploads/1/3/4/5/134584298/7ac8a67bf6b7.pdfIn PDF document text
    • https://cdn.sqhk.co/luwagoma/aiigjS4/jubezizosutumerufosob.pdfIn PDF document text
    • https://koxabiniz.weebly.com/uploads/1/3/5/9/135994092/lowun.pdfIn PDF document text
    • http://ruwemipuwev.mypressonline.com/snapper_mower_repair_videos.pdfIn PDF document text
    • http://nezowigivomi.scienceontheweb.net/how_to_turn_my_gas_fireplace_off.pdfIn PDF document text
    • http://belplitka.ru/66109262252aug3j.pdfIn PDF document text
    • https://cdn.sqhk.co/zoluxoni/f3NUGe5/falling_for_christmas_full_cast.pdfIn PDF document text
    • http://dumagut.22web.org/54029212785.pdfIn PDF document text
    • https://derebadinexito.weebly.com/uploads/1/3/4/0/134012579/bivit-zinurebidolazef-sirunepopulonot.pdfIn PDF document text
    • http://vijufik.iblogger.org/corn_growing_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/jasurisunav/hhdd9ih/87254166136.pdfIn PDF document text
    • https://cdn.sqhk.co/pevelefotuve/VHlKibW/bevinitupugozutegomomam.pdfIn PDF document text
    • https://cdn.sqhk.co/pazakazagoz/Y8KgjE1/android_network_monitoring_warning.pdfIn PDF document text
    • http://gatofupimekow.mywebcommunity.org/academic_writing_and_presentation_skills.pdfIn PDF document text
    • http://marketitaly.info/check_writing_worksheets_for_studentsf9du9.pdfIn PDF document text
    • http://prognoz-football.club/65450374785588as.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://34570882-574e-4d25-8c0e-d8b9b6c2967f.filesusr.com/ugd/cb2bed_41b0e80ef36946e58574a7a2ea8dec88.pdf?index=trueIn PDF document text
    • http://fufudaloxola.onlinewebshop.net/design_of_reinforced_concrete_10th_edition_textbook_solutions.pdfIn PDF document text
    • https://dda5c79a-a75d-44d9-a006-48dec3bfe172.filesusr.com/ugd/115d6e_4b8142f23db34309b22d0c95f8c5cb21.pdf?index=trueIn PDF document text
    • https://f3dbd103-cf2f-44fc-b0ad-c9004dc38af2.filesusr.com/ugd/1f2646_f20e785ddad14ea4b864813361016e77.pdf?index=trueIn PDF document text
    • http://fetekovabu.onlinewebshop.net/room_on_the_broom_download_free.pdfIn PDF document text
    • https://1e5c9289-19ee-4e40-ae77-03f2e727eb38.filesusr.com/ugd/e3c460_2d5a52097c2d4d3a82f933479ffe1e15.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ECE 2828 bytes
SHA-256: f1383d7cd59a6739427f7596f1165603adacbacc8f657d4e156367611f565abb
font_01_sfnt_off000118d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118D7 5380 bytes
SHA-256: 6d9688b3b34245c926ac1b76b832c87a2bae1dba7df3bdb446db185de54ab90e
font_02_sfnt_off00012b32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B32 11652 bytes
SHA-256: a7bb6200c5e9311f71d9e0a44c5d6341941e34498a20735ec8626110e719846f

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