Malicious PDF — malware analysis report

Static analysis result for SHA-256 909363d23866115f…

MALICIOUS

PDF

83.4 KB Created: 2020-12-24 22:46:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8342b6ef1c51ebc55c1d60f3d91359da SHA-1: 14b73d8aae5f801d2171b98b92141b15ed65c242 SHA-256: 909363d23866115fc880ce91cc605ed3d28ce0556e5ff7b38e599e67b6f42d76
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://traffine.ru/strik?utm_term=sim+card+info+and+contacts+transfer+apk PDF link annotation
    • https://cdn.sqhk.co/zirimikuj/R5WBZmR/photo_colour_change_app_download.pdfIn PDF document text
    • https://tujurexi.weebly.com/uploads/1/3/4/7/134743655/babinebatabaro-jepex-piriwamomavog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376610/normal_5f8aca6e0228b.pdfIn PDF document text
    • https://rosanibo.weebly.com/uploads/1/3/4/8/134873488/vabinureruk.pdfIn PDF document text
    • https://worozimovazez.weebly.com/uploads/1/3/1/4/131406108/2353720.pdfIn PDF document text
    • https://wanuwoziburake.weebly.com/uploads/1/3/4/4/134458428/1417649.pdfIn PDF document text
    • https://cdn.sqhk.co/wavoperusina/2ia9jiC/rope_cutter_hand_tool.pdfIn PDF document text
    • https://netulomite.weebly.com/uploads/1/3/2/8/132814473/viwapukukuzupokas.pdfIn PDF document text
    • https://tonavamajarow.weebly.com/uploads/1/3/4/6/134694337/8845039.pdfIn PDF document text
    • https://zavurebugefogoj.weebly.com/uploads/1/3/4/3/134397626/mifikazevunep.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/jolozidabi/effective_english_communication_skills.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/18600242202.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/1st_and_2nd_conditional_games.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/5262243461.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/13300041947.pdfIn PDF document text
    • https://s3.amazonaws.com/metakibeme/97340826602.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/mac_os_high_sierra_10._13._6.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_off0000f34a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF34A 5436 bytes
SHA-256: 74829507065eccd803d5faddb2f2c62462a2b3afeaa1bf4919151e22907593d9
font_01_sfnt_off000105b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B5 10788 bytes
SHA-256: 3f8fb6ecfd213b4e64e5a8ec4a4a02260fd8235481ba9105720954978c8fed80
font_02_sfnt_off00012ac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AC9 16096 bytes
SHA-256: 61761e6c71fdd980502ce8a3a8cbf9590216241eb9eabe72fdf309a1c23cd3c2

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