Malicious PDF — malware analysis report

Static analysis result for SHA-256 d64bbbe2a5838a20…

MALICIOUS

PDF

77.6 KB Created: 2021-03-28 02:10:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de8d61f621a6e139c89df632de8a197d SHA-1: b1b7c26486d9079021d6c10a9c84d4a6c13f7321 SHA-256: d64bbbe2a5838a2011640f30db8bb81364b0db17e82684a7ae6eecc779242a1e
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 of which appear to be part of an SEO link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. The primary malicious URL identified is https://lozipotod.ru/award?keyword=el+viaje+del+heroe+pdf+gilligan, which is likely used to redirect users to a phishing or malware-hosting site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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
  • 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://lozipotod.ru/award?keyword=el+viaje+del+heroe+pdf+gilligan
    • http://wofotejijuwulap.iblogger.org/gejisubunejufurujage.pdf
    • http://wujejejifi.mygamesonline.org/86065803102.pdf
    • http://xevusezes.medianewsonline.com/86853796847.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kufazete/steel_column_design_example_as_per_is_800.pdf
    • https://s3.amazonaws.com/wozoxub/wrong_turn_7_full_movie_openload.pdf
    • https://s3.amazonaws.com/batiku/marksheet_excel_file.pdf
    • http://gifagedopodub.epizy.com/31813655073.pdf
    • http://lokokojorivumi.rf.gd/95434398358.pdf
    • https://s3.amazonaws.com/xisefowu/42518078155.pdf
    • https://uploads.strikinglycdn.com/files/83a2bcb6-e122-4210-8d18-7bd3811fae0d/34346345947.pdf
    • https://uploads.strikinglycdn.com/files/89114a84-5ded-43ee-a454-04b6a8ddb15d/best_buy_coupon_code_nov_2020.pdf
    • https://uploads.strikinglycdn.com/files/ce0a1137-93cc-45ba-afd6-9e12a3c05755/easa_flight_and_duty_time_limitations.pdf
    • https://f421159b-d329-41e8-bc42-072bc93e4c50.filesusr.com/ugd/65d6f7_7516af83388d405aa2f4b8aae828ac77.pdf?index=true
    • http://murarefap.epizy.com/tamil_advertisement_mp4_video.pdf
    • https://a49aa754-465e-4bbd-924e-b3d0e7b66bd4.filesusr.com/ugd/81d6a4_2b36e94213a0472f8327a91871d1ca8c.pdf?index=true
    • https://1482387f-61d8-47e1-b538-9b7f1e8b89fb.filesusr.com/ugd/538d67_327fa7b788134f56816a56e7dfa3b1b4.pdf?index=true
    • http://susabumo.atwebpages.com/atomic_structure_simple_explanation.pdf
    • https://uploads.strikinglycdn.com/files/3f42eb98-1aed-40ef-bbc8-8180a4a9d4d4/20045956487.pdf
    • https://6f8cb219-4830-455d-9ced-b55e65700e85.filesusr.com/ugd/fd30ac_ea58321fb91a4fc796c49ec30177f33f.pdf?index=true
    • http://rogomore.myartsonline.com/kukima.pdf
    • https://uploads.strikinglycdn.com/files/9acbab2f-3402-4366-978d-a5542ee4cd12/glanzer_and_cunitz_evaluation.pdf
    • 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_off0000edff.bin
0f1eddc7e0cb953b472e546aada6299511ec5a52eb866342639ccee8abed4f9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFF 5220 bytes
font_01_sfnt_off0000ffcb.bin
31de72147314e5c1a0cbb579da6db15d13eb9e771c57e8c7495981509e234f85		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCB 12272 bytes

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