Malicious PDF — malware analysis report

Static analysis result for SHA-256 b49210985b163fd9…

MALICIOUS

PDF

143.9 KB Created: 2021-03-19 04:53:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5efddf7d47780aa77bcca2d41c0d4964 SHA-1: b0476b1f43c46f6ad2377de19cb5c4d9b508f1c6 SHA-256: b49210985b163fd9869105e3f95aa41c20896fdd75106c1ef990accda30c90ac
196 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is part of an advance-fee scam, using lottery or prize language with parcel delivery requirements. It also contains a mass external PDF link farm, with one of the primary links being http://pedron.fun/nadubuxuxagomorux1qdqt.pdf, suggesting it's designed to lead users to download further malicious content. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://zajinet.ru/strik?utm_term=how+to+make+fridays+cajun+chicken+and+shrimp+pasta
    • http://pedron.fun/nadubuxuxagomorux1qdqt.pdf
    • http://urott-hu.com/samsung_email_address_philippinesrnint.pdf
    • https://betepojikimiji.weebly.com/uploads/1/3/0/8/130874485/a1ec7fdea40b2a.pdf
    • http://eeeeeyyy.space/zubesebageoxtd.pdf
    • http://legendnat.space/gopro_hero_4_silver_price_south_africaj8s4l.pdf
    • https://pagafamowadaf.weebly.com/uploads/1/3/4/8/134878907/2167595.pdf
    • https://xilasofuvi.weebly.com/uploads/1/3/4/6/134651230/8732510.pdf
    • http://rankingcoach-seo.com/311075017109the0.pdf
    • https://cdn.sqhk.co/demejapad/dheHjgg/73210885906.pdf
    • https://fidesafova.weebly.com/uploads/1/3/4/8/134876701/29a1f331b6ab.pdf
    • https://cdn.sqhk.co/moserusoba/Ct3gcJj/tuxopipizugomiganadoku.pdf
    • https://cdn.sqhk.co/doporaba/awkpl2s/creepiest_movies_on_netflix_canada.pdf
    • https://poxapoxidofex.weebly.com/uploads/1/3/4/0/134016688/lotikaru.pdf
    • http://itclick.pro/dog_due_date_calculatorl018f.pdf
    • http://coolvdomaion.online/conquest_us_history_definitionj286f.pdf
    • http://onlinetiser.website/83257783536fyr10.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fekife/canon_lide_110_toolbox.pdf
    • https://cae2aa39-5014-47ec-b549-0fed73f36d02.filesusr.com/ugd/c8683e_a0706c13ee7b460db38ad5fd7e0d5fc1.pdf?index=true
    • https://s3.amazonaws.com/luxelula/bastien_piano_basics_level_1.pdf
    • https://599b09cd-7b6a-4758-94a3-08a08d316165.filesusr.com/ugd/628a76_b8b1821f71f2456097d0d98acf3e4060.pdf?index=true
    • https://2b08c346-38d8-4763-b559-bb9d4fff2313.filesusr.com/ugd/40c9d6_11899531a8d84c03801cbbf18c7e64f0.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001dc1a.bin
c0265b7d617e211d20091ca0892d200fef9fbd02a3b649079643830e2216ced1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1DC1A 5656 bytes
font_01_sfnt_off0001ef4f.bin
4713e97fa67e2062fc3f8f2dc3199c3ab13d654998c718efbd28639d6e18caf3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1EF4F 12508 bytes
font_02_sfnt_off0002198a.bin
531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2198A 16312 bytes

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