Malicious PDF — malware analysis report

Static analysis result for SHA-256 6187482694280e1d…

MALICIOUS

PDF

75.6 KB Created: 2021-03-17 10:36:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cce5a8d28ef14ba9588d0c966f9d7afa SHA-1: dd3cbad399704202bf0ba33930a3e930debe5e14 SHA-256: 6187482694280e1d5ac3453f361f208c00cbe2098f1e051d64cc7972049f135c
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, many of which are SEO-optimized slugs, indicating a link farm or SEO manipulation tactic. The document body, though heavily obfuscated, suggests a lure related to 'business law book pdf for mba'. The presence of ClamAV detection and ML flagging strongly suggests malicious intent, likely to redirect users to phishing or malware hosting sites. No scripts were extracted, but the structure and link farm heuristic point towards exploitation for client execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://ponafet.ru/award?keyword=business+law+book+pdf+for+mba
    • http://opit.space/how_to_mount_lowrance_totalscan_transducer3w98j.pdf
    • https://cdn.sqhk.co/tamaladafa/cy6beie/bonilazarulegaram.pdf
    • https://jibidamo.weebly.com/uploads/1/3/5/3/135337573/jegulupatovele.pdf
    • https://nemabofafuz.weebly.com/uploads/1/3/5/3/135389169/sexijexem-wefedudulis-kudotiluxibinos.pdf
    • https://cdn-cms.f-static.net/uploads/4403404/normal_600dd094d0f45.pdf
    • https://cdn.sqhk.co/sekigizakeku/fhcIQAN/casa_grande_manapakkam_review.pdf
    • https://cdn.sqhk.co/lovaxixifew/Mjhrnic/57416913754.pdf
    • https://cdn.sqhk.co/tufuboloruj/bhehhhc/video_player_download_for_pc_filehippo.pdf
    • http://xelamoxadavas.mywebcommunity.org/d_d_5e_descent_into_avernus_download.pdf
    • https://static.s123-cdn-static.com/uploads/4376599/normal_5ff95918d3a83.pdf
    • http://biomanix.best/madolekobe5c6j0.pdf
    • https://cdn-cms.f-static.net/uploads/4501028/normal_6009f077307c5.pdf
    • https://cdn.sqhk.co/ganuniwiku/hbPifcQ/14226582912.pdf
    • https://jotesufuxave.weebly.com/uploads/1/3/1/4/131483421/rutum_sewikexofi_jebuzi.pdf
    • http://fafijitesulexiz.mygamesonline.org/6.7_powerstroke_transmission_fluid_type.pdf
    • http://manthoughtswebsite.website/88616317652ud210.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://318abaa7-a496-4882-a5ef-186b1d719b20.filesusr.com/ugd/ff2e65_88f63e7dd26c48b4bb78a2b03aef09d5.pdf?index=true
    • https://dc010c70-835d-4b56-8cb0-1e1bda7cab64.filesusr.com/ugd/fb576b_f4a881a3736242f39d6d34b217b6961e.pdf?index=true
    • http://bixozebaxikapos.atwebpages.com/fijunegetepoliparola.pdf
    • https://247e77cc-5367-4382-8586-7c5891409f42.filesusr.com/ugd/2dbf5a_afe51984f96e4d359ed0299e86e86488.pdf?index=true
    • https://5cbbff6b-7c47-4fbb-abda-9de5069fbc88.filesusr.com/ugd/1a89c8_7d05ab977da94adaad9e9a3fe5fb56d7.pdf?index=true
    • https://9d76d0c6-5807-43ac-a2ba-7b4112d1a20a.filesusr.com/ugd/5cd33b_43d0c80b83eb4887a0ce73f5386cf3e9.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8fa.bin
161dfc844d1f595056ab27745201ef363ae8bab0b80cdd8269f5172f2b14486c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FA 5532 bytes
font_01_sfnt_off0000fbcb.bin
1feaf4b8a5c2040cfd26e50b9cf7f9e74de4404e0a446457116dab14910256dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCB 11136 bytes

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