Malicious PDF — malware analysis report

Static analysis result for SHA-256 606563f0c874a7a7…

MALICIOUS

PDF

81.3 KB Created: 2021-03-30 09:48:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b042f35bc9fbdd46dcd50d15aaab16b0 SHA-1: 57ee1f5bc60b16c8c73b8c8230df6922c61d39cd SHA-256: 606563f0c874a7a791edbd5df6136c761a24a2c52370d793624ccaa5aa32dffb
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://druttle.ru/wix?keyword=minecraft+magic+tether PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4447464/normal_5ffb401981754.pdfIn PDF document text
    • https://waxogisuges.weebly.com/uploads/1/3/0/7/130776632/1804478.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378393/normal_605c4ef9e31e8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365584/normal_5ffcc4ac7393e.pdfIn PDF document text
    • https://lufisadoxusixa.weebly.com/uploads/1/3/4/5/134583632/1865228.pdfIn PDF document text
    • https://cdn.sqhk.co/jigekuragige/u6hfUhg/muxujokurufuku.pdfIn PDF document text
    • https://pesosetolumejaw.weebly.com/uploads/1/3/6/0/136094132/a2ee0c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445871/normal_5feb97fd1bf81.pdfIn PDF document text
    • https://pojojozujivalim.weebly.com/uploads/1/3/1/1/131164399/girovulovasila.pdfIn PDF document text
    • https://cdn.sqhk.co/velabolo/0Spgjih/w3schools_c_structures.pdfIn PDF document text
    • https://cdn.sqhk.co/letareximo/OhgjeyE/dosujimomis.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/papuja/argumentative_essays_topics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca18eca5-bdc7-4818-b8aa-6e8c5e6f4a6c/ribumeke.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/just_already_yet_exercises_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/the_idiot_boy_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb323f98-1cf5-4f70-9a08-d09ad3d0cb88/how_to_make_a_square_picture_round_in_illustrator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4b54b57-3357-4147-ae37-854ad83ebb4f/49379938217.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/xagovitepumonifaje.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/figikerumolim.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD4 5088 bytes
SHA-256: c3288835c515d82ac6cda2ecd75055a5e979c71f31b4f71bd5b993383ed74ba8
font_01_sfnt_off0000fd07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD07 10712 bytes
SHA-256: dc2816992c21593b5a501a75aa63f44396937fc492106613009a4569384c7b45
font_02_sfnt_off000121e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121E9 16064 bytes
SHA-256: 8ce0575abc6f686af3c1393089841c21814f5c4838d5adbe0d649219e58da802

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