Malicious PDF — malware analysis report

Static analysis result for SHA-256 298b45469be82b5a…

MALICIOUS

PDF

86.6 KB Created: 2021-03-21 00:36:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 82568ce0792ef70620a86424876cafb0 SHA-1: b2f816d07b064d0fd411e6cb24190782037bc326 SHA-256: 298b45469be82b5a421d1423c0dc9d602da7ae328a6685b4659465854ccfa883
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the overall structure points to a lure for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://golowaki.ru/123?utm_term=reporter+news+channel+video PDF link annotation
    • https://cdn.sqhk.co/kurotevu/gh2xahC/download_commander_battle_mod_apk_android_1.pdfIn PDF document text
    • http://degitowexara.iblogger.org/bioavailability_of_curcumin_problems_and_promises.pdfIn PDF document text
    • http://bubble1.space/xexuwukqntm.pdfIn PDF document text
    • https://cdn.sqhk.co/tigoxexuda/fhYjdYp/go_dog_go_ball_launcher_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/D9ryghB/52589923726.pdfIn PDF document text
    • http://biduwupukipajov.22web.org/vusetutimelufuxopatajuzev.pdfIn PDF document text
    • http://paksorond.xyz/cqc_inspection_reports_domiciliary_carenfs0n.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn PDF document text
    • https://86042ffc-9b62-460b-8552-fb2522205a17.filesusr.com/ugd/4f92c1_749674a337b943be818fa4b296b4a391.pdf?index=trueIn PDF document text
    • http://dofatolepe.epizy.com/botog.pdfIn PDF document text
    • http://japawipejaxuf.epizy.com/32589266631.pdfIn PDF document text
    • http://wevevaviz.epizy.com/vazifefenidexi.pdfIn PDF document text
    • https://ab25a8b3-4d80-4d4b-93a1-c1347014fa7c.filesusr.com/ugd/8d0191_a6663998a2304bc28371e51637a73ece.pdf?index=trueIn PDF document text
    • https://ec8c99fd-5413-4e38-b6a0-2ccbba71fc6f.filesusr.com/ugd/de02f3_00769ee0d68a4f01a1b05778adac7d51.pdf?index=trueIn PDF document text
    • https://76f5a3e5-08d8-4581-9975-6c1b933a1845.filesusr.com/ugd/dbbd16_c922e9932987458f9dd2e235d58a5e21.pdf?index=trueIn PDF document text
    • http://moxowofabijis.epizy.com/nofalemuxuxadozodemi.pdfIn PDF document text
    • http://bibijovefuvak.epizy.com/what_multiplication_chart.pdfIn PDF document text
    • https://cae2aa39-5014-47ec-b549-0fed73f36d02.filesusr.com/ugd/c8683e_d897e93a78ff45ff947db0a483b42dd4.pdf?index=trueIn PDF document text
    • https://4868a29a-6d77-448d-a9c5-bc5c6a1713c3.filesusr.com/ugd/060e50_7232b9735c384acb95c273e524778a62.pdf?index=trueIn PDF document text
    • https://254a6a59-343e-4b7e-907c-c4819e171fff.filesusr.com/ugd/decf6f_e7ca37300275428691a2e5fc7d19cd4f.pdf?index=trueIn PDF document text
    • https://dc5ca969-d333-4582-9879-b719aca70d73.filesusr.com/ugd/760c43_ed5410da114d4241a2e4f04e2b2f5052.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
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e60d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE60D 5320 bytes
SHA-256: f5440bd3b8c1ee3c0c1a2f9e6e266842854a41ff6c83acff3f20f582eb566a80
font_01_sfnt_off0000f835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF835 15196 bytes
SHA-256: 34b033f279c703fefdac2ce37df8e04b65dc049f8c9e11232bdf2497b14408f7
font_02_sfnt_off0001285a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1285A 10852 bytes
SHA-256: aac218666e1730daf87a3bb4b2c874005c9ce2008e4dbc79cc974b5b5b673e06

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