Malicious PDF — malware analysis report

Static analysis result for SHA-256 fafbbcbe702d3974…

MALICIOUS

PDF

70.9 KB Created: 2021-05-02 17:28:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 19b9832ae2cedb87bd8d0d4f38bbff38 SHA-1: 3480c2a7b5c8586bbfd611db6d5c4c90c7fb5395 SHA-256: fafbbcbe702d39745e87ccba6a90404fa8cc4927350fc0ca34c3a698ef9a2444
144 Risk Score

Malware Insights

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

The PDF file contains a lure related to origami, but analysis reveals it is a phishing or malware distribution attempt. The 'PDF_SEO_UTM_REDIRECTOR_LINK' heuristic indicates a redirector is used to obscure the final malicious destination. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the embedded URLs point to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bologen.ru/strik?utm_term=how+to+make+an+origami+dragon+out+of+a4+paper PDF link annotation
    • http://losopefopamusoz.sportsontheweb.net/bupuwupijepizafozolod.pdfIn PDF document text
    • https://cdn.sqhk.co/bemovunilupo/jjMha1I/fozanamukizet.pdfIn PDF document text
    • http://kengoru.space/remouse_micro_crack7by1f.pdfIn PDF document text
    • http://delayikapy.xyz/how_to_give_a_counterexample_in_math2xy1d.pdfIn PDF document text
    • https://cdn.sqhk.co/firavibaw/c8ligjj/22577285818.pdfIn PDF document text
    • http://dvestideyli.xyz/4700761269ub2mc.pdfIn PDF document text
    • https://cdn.sqhk.co/girolivudafo/iXezhaG/.pdfIn PDF document text
    • https://cdn.sqhk.co/bubarozotuj/jjyjghh/technical_interview_question_for_ece.pdfIn PDF document text
    • http://zitirisiz.mywebcommunity.org/tozasa.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzesowasu/EjhpjgW/29831052833.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/ebccdf4c-5157-454f-90b3-d55b9421e9c1/how_to_connect_vizio_soundbar_to_roku.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/85536705159.pdfIn PDF document text
    • http://loxupobupibim.atwebpages.com/65990607353.pdfIn PDF document text
    • https://s3.amazonaws.com/moduluzuxikari/48181104561.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/11812239537.pdfIn PDF document text
    • https://09ec9d85-9312-4337-94d0-b84080e05f2e.filesusr.com/ugd/ac0094_b99cc281145c4d049ac2e5813ba8e37a.pdf?index=trueIn PDF document text
    • https://8ed7b8cb-9bae-4def-ad9b-66b28cd11f91.filesusr.com/ugd/740d8c_0211f4de30e34f2ba9a622fec9882c73.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/540fbd2f-ba82-4a2d-9e16-0b1f62b2ab39/basic_computer_networking_objective_questions_and_answers.pdfIn PDF document text
    • http://duziroro.myartsonline.com/90286531099.pdfIn PDF document text
    • https://2065f6f1-29fb-48ac-a230-4f4ab2d4b746.filesusr.com/ugd/b62953_fa6056620059421281e5fdaa82bd7b94.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/aadada97-d596-44a5-a425-0dd9c6e640b3/16917684920.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e8b8e34-7497-4199-a3a7-c3cd6079e54b/zuxeborunopuvezesunije.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/wadego.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/vuxufedabojota.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_off0000d2e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E3 5356 bytes
SHA-256: 3703e39912f1fcdc52294571f8c19dccc51e218ea7c685372b9ba4e313be6b4f
font_01_sfnt_off0000e520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE520 11832 bytes
SHA-256: b629699aa57b97e0f15973148b9f3b0dd7af0e38fb2fd3153ab6d8db35391024