Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2052768aa737d74…

MALICIOUS

PDF

78.9 KB Created: 2021-05-18 23:21:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: cca7b5a669bb65675bc0e6acc6786a5e SHA-1: 7171d3e9ed20c34289a7aef684b1536b74e91aa8 SHA-256: a2052768aa737d746c78a6903bf9373cb9ba6133b72b8ea095712435e3e8947e
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 0.9996

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://maypoin.ru/strik?utm_term=bissell+cleanview+swivel+pet+upright+bagless+vacuum+review PDF link annotation
    • https://buzelobuledu.weebly.com/uploads/1/3/1/3/131397981/9756860.pdfIn PDF document text
    • http://retafap.22web.org/optimate_4_dual_can_bus_bmw.pdfIn PDF document text
    • http://vulujukido.iblogger.org/10th_standard_new_syllabus_social_science_book_volume_2.pdfIn PDF document text
    • https://gutazalofekeva.weebly.com/uploads/1/3/5/3/135395177/c12bd1dee4.pdfIn PDF document text
    • https://masenajeronuzes.weebly.com/uploads/1/3/1/6/131637464/098a1c7de4364.pdfIn PDF document text
    • https://latitatuforuza.weebly.com/uploads/1/3/1/3/131398212/zesodit_zidetalumam.pdfIn PDF document text
    • http://jolujunutido.iblogger.org/tolixolifofadev.pdfIn PDF document text
    • http://butitami.22web.org/sipuvulitadizu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://getojigukas.epizy.com/galonosotapegu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/270d16b0-60a7-48bc-a235-fa4b8aac0cf2/naloja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa732171-8dfc-440c-b78e-d5e2ef471a18/how_far_apart_should_floor_joists_be_on_a_deck.pdfIn PDF document text
    • http://pikarofuwab.epizy.com/flemington_races_melbourne_cup_form_guide.pdfIn PDF document text
    • http://xiteberukebeki.epizy.com/77950860157.pdfIn PDF document text
    • http://puwiliguso.rf.gd/mavudavagabija.pdfIn PDF document text
    • http://zurinelu.epizy.com/padepelopigexazo.pdfIn PDF document text
    • http://zaguvigijosev.epizy.com/25616688774.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53f6c6c0-6e54-433a-ae62-083065b98a75/mom__me__mom_by_maya_angelou_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b269fdee-170d-4f5f-b7b1-37e77cf614ad/democratic_leadership_style_in_nursing_journals.pdfIn PDF document text
    • http://luwemazezabubat.rf.gd/chilled_water_air_conditioning_system.pdfIn PDF document text
    • http://tuwawolaninezon.epizy.com/adobe_indesign_complete_tutorial.pdfIn PDF document text
    • http://misosemarimo.rf.gd/kifelomejavusavujuruv.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FE 5688 bytes
SHA-256: c43d478295b7a6d271a9c188a91d345864df9559ed031ff9fb027c020f2c2b5a
font_01_sfnt_off00010747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10747 11240 bytes
SHA-256: e7fd77958fc3e533312e7b1f63dfd26c754f77d51db8123393197faec9f021a0

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