Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e72fa911cc8045e…

MALICIOUS

PDF

107.6 KB Created: 2021-03-25 20:47:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 77003718608d1f0e6ee03dc6493bb032 SHA-1: 9187c32ad1f50af9f591c38e2bdf70192c6bea0a SHA-256: 2e72fa911cc8045e9732b703e9a2d84667e783dfe2d07c8023e5e8c59be77880
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains, suggesting a link farm or phishing campaign. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URL 'https://lozipotod.ru/strik?utm_term=how+to+build+a+bushnell+telescope' is likely part of the lure to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://lozipotod.ru/strik?utm_term=how+to+build+a+bushnell+telescope PDF link annotation
    • http://naturapple.space/appendicular_skeleton_worksheet_revised_9_06kcke8.pdfIn PDF document text
    • http://devgame.design/namipedotew8lt5q.pdfIn PDF document text
    • http://sehq.xyz/sonibepototobovirozewafems8sb1.pdfIn PDF document text
    • http://cheatyou.site/129775671203nvvh.pdfIn PDF document text
    • http://porizaritofo.mypressonline.com/niwimad.pdfIn PDF document text
    • http://xedijama.getenjoyment.net/breadman_recipe_book.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • http://vesajob.getenjoyment.net/bsc_part_1_math_book.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5a4e7950-e122-4b3c-9cf7-894e7f5b1216.filesusr.com/ugd/76aeb6_14e196f5dd5c43df9b7bf4e2ff2b71c7.pdf?index=trueIn PDF document text
    • https://e791dc30-71fd-4519-a75e-453748eb9c32.filesusr.com/ugd/8a5fcf_3a78892492c94a089bf76eb6e8e8b0a8.pdf?index=trueIn PDF document text
    • https://19aaccd0-9772-41b6-85c4-be118606641a.filesusr.com/ugd/a12125_3af14209fbb14673af16805c3cb7684a.pdf?index=trueIn PDF document text
    • https://00407fa8-a9ef-4b78-9bbe-46147fc8acf6.filesusr.com/ugd/5ecadc_c0137a80662e4058982f6d58bb591188.pdf?index=trueIn PDF document text
    • https://aaf2f8d8-4593-4070-95c3-ed2308805076.filesusr.com/ugd/337eea_746614bcda914445acf9f5669903fd8f.pdf?index=trueIn PDF document text
    • https://67bb8873-ca08-4da4-87c0-60a8072ebff6.filesusr.com/ugd/a838c0_93740180a0c04531b2d67ac6d9e59f38.pdf?index=trueIn PDF document text
    • https://01c19f78-c7d0-441a-b56a-8672493f87de.filesusr.com/ugd/9d66c7_ab80bc8396e44bcf945d0e20180aae8d.pdf?index=trueIn PDF document text
    • https://f815f12b-539f-4060-8ed9-abd2caada31b.filesusr.com/ugd/ceb2e8_c3bea8d68b0741b38e0ce7527bc71b7c.pdf?index=trueIn PDF document text
    • http://tanonarimunal.myartsonline.com/stihl_lawn_mower_comparison.pdfIn PDF document text
    • https://1237a3da-0b33-4890-9ba9-974507bf2590.filesusr.com/ugd/3e0cb9_3d68f1b071214822b342af63e7f70b03.pdf?index=trueIn PDF document text
    • https://650c977b-0274-48a2-8498-43c0efc39f4e.filesusr.com/ugd/dbad32_649f70fb89914d49a0b01eca2cb2f81b.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000167c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167C2 5256 bytes
SHA-256: 49d1dff671f6ff030baba34276a9f5dc43fe3673f73d59a222317d4b4ae639ff
font_01_sfnt_off000179ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x179AB 11864 bytes
SHA-256: ea55e0140fb543fc1a1d868e929ee2bd1dd9e9e2bcce70b4dd19edd781ee6d31

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