Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7744ca84bcf2812…

MALICIOUS

PDF

73.4 KB Created: 2020-12-19 07:34:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 0153e506519eff1a88d27ab8e2e03f80 SHA-1: efe2aae566f8103c1e88a973549522d7fba44715 SHA-256: b7744ca84bcf28120adfa139f540029e35ab71974c0ab24b9374fdf0a4fbce01
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, with a heuristic identifying it as a 'PDF_SEO_LINK_FARM'. The primary malicious URLs identified are trafftec.ru and a Weebly-hosted PDF, suggesting a distribution or phishing campaign. No scripts were extracted, but the presence of numerous external links points towards an attempt to redirect users to 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://trafftec.ru/strik?utm_term=troy+bilt+2200+pressure+washer+parts PDF link annotation
    • https://ludolukek.weebly.com/uploads/1/3/4/6/134699908/5198112.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449392/normal_5faaf4e9cae82.pdfIn PDF document text
    • https://pupogonixim.weebly.com/uploads/1/3/4/3/134318621/7184616.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495974/normal_5fdc656d895a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450353/normal_5fda2db367c02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371791/normal_5f918011bbb10.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sanekufiwumafo/carbon_copy_sales_receipt_template.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/information_about_eight_planets.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/expedia_flights_customer_service_number.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e2c57848ba205d187778/t/5fc327d74f9837572046e766/1606625240365/50904574278.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc4de481-467d-416a-afc7-eb8d87a93785/adjetivos_demostrativos_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23b12ba8-a5aa-44ea-9e0a-8c5ead8fefcf/zarutonaxanajoduvape.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/android_10_liste_smartphone_samsung.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/integers_worksheet_with_number_line.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcf5182665af30590bf3305/t/5fd64a7f96ed101a3e3cb9c7/1607879295942/yield_management_airlines.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce13e37d85b15ca79f7857/t/5fd6ee6cdf2f0204c24ae7de/1607921260961/child_information_sharing_cis_scheme.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_off0000d4be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4BE 5240 bytes
SHA-256: a993312e0f735d6c576dde16b9118da0c4529af1ccab938283efcc832d5617dd
font_01_sfnt_off0000e6b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B6 10556 bytes
SHA-256: 6a2887f2c1dc960284c696ed3d319f591013c13ade21d10cc7abadf5b9125bdf
font_02_sfnt_off00010abf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABF 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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