Malicious PDF — malware analysis report

Static analysis result for SHA-256 9af814de5a10c14a…

MALICIOUS

PDF

75.9 KB Created: 2021-03-01 15:58:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4fa9396b939884bf3e7fd465ba83373d SHA-1: 625b302445f52df2318942d0e465184b792ba024 SHA-256: 9af814de5a10c14ada585d8107ea6b56cf40162cd0ce83d4f6a9d1ca1bb7a191
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains a large number of external links, many of which are dynamically generated, suggesting a link farm or phishing operation. The primary URL, 'https://fokemale.ru/aws?utm_term=paper+mario+origami+king+how+to+make+shy+guy', appears to be a lure, presenting itself as a search result for a popular game to entice users to click through to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://fokemale.ru/aws?utm_term=paper+mario+origami+king+how+to+make+shy+guy PDF link annotation
    • https://cdn.sqhk.co/jurugaguvedu/cVhaq1i/gas_gauge_reading_crossword.pdfIn PDF document text
    • https://cdn.sqhk.co/goxobuve/g1kRRQ8/ximafetegaserowi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463554/normal_600d8840e81b3.pdfIn PDF document text
    • https://cdn.sqhk.co/tedefoso/Gnmibgc/vupef.pdfIn PDF document text
    • https://bixagitiwor.weebly.com/uploads/1/3/4/6/134618264/ae309dae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481055/normal_6019d7404176a.pdfIn PDF document text
    • https://cdn.sqhk.co/jarogofef/AhdHchh/xisusuwugananefoxakorap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374708/normal_60370e3febe03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446017/normal_6020b9221a466.pdfIn PDF document text
    • https://cdn.sqhk.co/nisugavu/iKjagjm/download_text_message_ringtones_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/xawodoze/iieC1qn/peneketef.pdfIn PDF document text
    • https://xogofodaromaf.weebly.com/uploads/1/3/4/3/134387758/lusafimafuzuzarafux.pdfIn PDF document text
    • https://cdn.sqhk.co/vefoveted/bjj30gc/xixaxativu.pdfIn PDF document text
    • https://cdn.sqhk.co/jesovolavig/jgiepgc/66054471787.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454546/normal_5fdc5e8c54b25.pdfIn PDF document text
    • https://feroxetisilujux.weebly.com/uploads/1/3/1/4/131409167/munarunivupibutozuka.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/martin_luthers_95_theses_started_which_movement.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_off0000d72d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD72D 6692 bytes
SHA-256: 279f8fabf36ba66b579a1fd39875e97d8131508b96ad3438c96f3f6294387bb5
font_01_sfnt_off0000edc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC1 5460 bytes
SHA-256: 8de4fd8b42a55c357ca55975ecc52295956d615aa0dd85dea684a99bc75b9e03
font_02_sfnt_off00010043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10043 10112 bytes
SHA-256: 07328ded95d1e7073f80ac38f6d2d9f061344522314826db173aceeb99c8abbe

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