Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cb2362c70a7c047…

MALICIOUS

PDF

80.8 KB Created: 2021-03-15 05:19:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: d83a476336a63425899bdfc3355f447e SHA-1: e7a41ae3b9d6a2f3a19acbab1ba5fb07660d8c03 SHA-256: 7cb2362c70a7c047564ce084fdcc9d3f3251906608bc53e3027f7e08c5821a59
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to other PDFs, suggesting a link farm or a mechanism to distribute further malicious content. The heuristic 'PDF_SEO_LINK_FARM' and the presence of numerous external URLs strongly indicate a malicious intent to redirect users. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing or scam campaign, likely using embedded JavaScript for obfuscation or redirection.

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 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.
  • 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://jacksth.ru/strik?utm_term=kayla+itsines+zero+equipment+pdf+free+download PDF link annotation
    • https://cdn.sqhk.co/zosiwikiw/Bt6idqN/game_of_thrones_season_4_cast_king_tommen.pdfIn PDF document text
    • https://tilifopufobi.weebly.com/uploads/1/3/6/0/136049844/a89d5020.pdfIn PDF document text
    • https://cdn.sqhk.co/fusojafiza/ididjig/13132705875.pdfIn PDF document text
    • http://lazategomid.scienceontheweb.net/marcus_aurelius_meditations_book.pdfIn PDF document text
    • https://rilokudewagozem.weebly.com/uploads/1/3/4/5/134597993/1527943.pdfIn PDF document text
    • https://mavuweginu.weebly.com/uploads/1/3/2/6/132681431/womaposopesimel.pdfIn PDF document text
    • https://nozugaxuxanukuj.weebly.com/uploads/1/3/0/8/130813784/6d88559b806c.pdfIn PDF document text
    • https://visuxotilan.weebly.com/uploads/1/3/4/5/134593687/nubunojisalomabi.pdfIn PDF document text
    • https://cdn.sqhk.co/riroxale/DKvifn5/80971941316.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/dowadotiju/88255340831.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cf5fea5-7e91-4c5d-b590-2205ac37d8d3/42942917364.pdfIn PDF document text
    • http://lumosaneja.onlinewebshop.net/wikoliboga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af400fbe-6cb3-4580-a545-822e9ae036f1/garmin_driveassist_50lm_review.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/fadorewowiwemoz.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/vikowukefikegojivumiza.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/vofipivulijemiji.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/erythema_multiforme_patient_handout.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c1a1ccc-f0a9-4008-84e2-0186632b989a/how_to_write_a_scientific_summary_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a98ece7b-7b7a-4e07-b25e-3a21827713c4/wevinib.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/adapted_physical_education_books.pdfIn PDF document text
    • http://juwukopegonamu.onlinewebshop.net/38133156072.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7F 5408 bytes
SHA-256: bcc1762a02669f3c4a6aad80d4aa350e4ffcb828da7c47bac107b68009f16bcf
font_01_sfnt_off000100ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100EA 10840 bytes
SHA-256: 51a5a4cb0252424552e9b5f6a3b5e0de455602388ba8f6b0afe68b4eb1f8b183
font_02_sfnt_off000125d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125D4 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3