Malicious PDF — malware analysis report

Static analysis result for SHA-256 82333ba04742bfe6…

MALICIOUS

PDF

105.4 KB Created: 2021-01-18 10:12:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 4c841135e90213af3f02dafc4243beb2 SHA-1: 0b0feef1e14185dfe70201afdbe93d12c3bd3968 SHA-256: 82333ba04742bfe67372f4fa2529d4b04f51f4fd59bedc54de87de41fc2d9c3f
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The PDF contains a large number of embedded external links, indicating a link farm or phishing attempt. The primary URL observed is 'https://trafffe.ru/123?utm_term=10+to+the+5th+power+prefix', which likely serves as a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafffe.ru/123?utm_term=10+to+the+5th+power+prefix PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4401994/normal_5fd04d7cdfa57.pdfIn PDF document text
    • https://cdn.sqhk.co/pubisifibuj/jdVgjqu/road_riot_mod_apk_latest_version.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459176/normal_5fc061f36e306.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457008/normal_5fbd4029c9416.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/c84743950.pdfIn PDF document text
    • https://cdn.sqhk.co/fenazijeguk/ghiSjev/learn_spanish_lessons_for_beginners_1-_5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377656/normal_5f8aaa3c012b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372963/normal_5f99a7bfbca31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455185/normal_5fe824bd4d3f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378383/normal_5fd3303bc7fc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482858/normal_5fd64d5552f2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411250/normal_5f9742086e3d8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451356/normal_5fc3bd563e7f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366337/normal_5f9b39bdf31bb.pdfIn PDF document text
    • https://suganolorifumu.weebly.com/uploads/1/3/0/8/130814011/gopatarina.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467979/normal_5fa34c08911a5.pdfIn PDF document text
    • https://cdn.sqhk.co/kawonidoza/h6geggD/plants_vs_zombies_download_popcap.pdfIn PDF document text
    • https://xusopulude.weebly.com/uploads/1/3/1/0/131070786/jijifafi-vulasodo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471971/normal_5febe8e731926.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13927 4952 bytes
SHA-256: 5aade88f6a8ec4ce68924d31b948235bc8bed9fa5343481f5509289596e6297f
font_01_sfnt_off00014a23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A23 12220 bytes
SHA-256: 43c5672ab7f9ed66db1910c938e5c29b6a9a354394131757f59bfabce1cc7721
font_02_sfnt_off000173a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173A7 16180 bytes
SHA-256: 6c215844485ca61f6343859c2a77965d066fadc8c436c848aaad18627c4ec1b4
font_03_sfnt_off000188d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x188D6 6084 bytes
SHA-256: 0c3766dce408445f50e904d652c9326647873efe4fb22fffa238fb744f3c79a9

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