Malicious PDF — malware analysis report

Static analysis result for SHA-256 df909f6badc98380…

MALICIOUS

PDF

123.7 KB Created: 2021-03-21 02:25:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c2642691e4d01e3d2fd43421252e82ca SHA-1: 51014f1ca5ab72fadd538fe7c3da6064c8d4454a SHA-256: df909f6badc98380ccc721981ae3a3a650eb9bd17deba89e7362c2d1cf3bc2d4
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://xezojetit.ru/123?utm_term=examples+of+nonconformity+in+self+reliance PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417123/normal_602fc61721be0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387704/normal_600c1b43d6cf4.pdfIn PDF document text
    • http://kellys.space/52880196657u7lde.pdfIn PDF document text
    • https://cdn.sqhk.co/noluxokeruma/hfijicw/silver_dollar_city_tickets_cheap.pdfIn PDF document text
    • http://business-open.online/vobenagulexedosasodezawavwff6.pdfIn PDF document text
    • https://cdn.sqhk.co/zaviresodew/ihidhgu/tuckers_pottery_clay.pdfIn PDF document text
    • http://thrivewebs.com/33028730998sjiir.pdfIn PDF document text
    • http://bridgecommerce.com/ffxiv_titan_extreme_tank_guidej5wb6.pdfIn PDF document text
    • http://about-fb-support.com/bidexejazetapebakosege5jcvr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383679/normal_602f2b75a1402.pdfIn PDF document text
    • http://povojixazev.iblogger.org/gupabigusorenufebewubeze.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c851c1a-95ac-4b02-afbf-f5ebcf88f9b3/medical_physics_problems_and_solutions.pdfIn PDF document text
    • http://wawuzir.epizy.com/57628386953.pdfIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/97923682232.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9029098c-8300-4208-8663-8038a154daa8/how_do_i_connect_my_brother_hl_2280dw_to_my_wireless_network.pdfIn PDF document text
    • http://togotavasokuzez.epizy.com/tiwuzamurofurelese.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/denamikexofiratedonivusip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01cae410-2501-4f05-925b-6a8088c1bd0b/what_kind_of_intermolecular_forces_are_present_in_h2o.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c961414-95d1-4020-94fb-df4619a4085e/data_communication_and_networking_forouzan_5th_edition_chapter_11_ppt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2448d917-ee54-4c90-8dac-3d7738caa4b4/bizixewitekineruli.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/14791215237.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/gubamurefesove.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_off0001a899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A899 5288 bytes
SHA-256: f6dd29475e8f078058e4b7e6b1ff110ed371846328a8de4968a35bf91fb864c2
font_01_sfnt_off0001ba90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BA90 10648 bytes
SHA-256: 770555027fa3b913d47a04295b7653b900cf0154336d547e3f037699fc73cdee

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