Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe354fe25d1d945d…

MALICIOUS

PDF

86.1 KB Created: 2021-03-10 07:23:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 93915a09b6a3dadddc442ae1eb5f7eac SHA-1: cb67ba2e480f21d6a6bb34422790490afbc82045 SHA-256: fe354fe25d1d945dcf43c5be8229c993ad317f04523022ec80ee529786e4b6aa
186 Risk Score

Malware Insights

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

The PDF contains a link farm with 30 external links, many hosted on disposable domains, suggesting a phishing or SEO spam campaign. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://resalured.ru/award?keyword=agenda+2020+pdf+gratis PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470961/normal_6029d9d408cb3.pdfIn PDF document text
    • http://girepodemaz.getenjoyment.net/vexipigebegesulagotimapur.pdfIn PDF document text
    • https://binewetakug.weebly.com/uploads/1/3/5/3/135326509/5a316ab00772.pdfIn PDF document text
    • http://modozadubop.mywebcommunity.org/quote_from_ralph_waldo_emerson.pdfIn PDF document text
    • http://dewisazovuvoxi.mywebcommunity.org/36424103619.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368229/normal_5fcb2597d1872.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485576/normal_602ab36e38b03.pdfIn PDF document text
    • https://kevosenebiv.weebly.com/uploads/1/3/1/8/131871602/wekonovom.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482402/normal_5fcd335e553a6.pdfIn PDF document text
    • http://bumasujofoj.getenjoyment.net/nipelir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366343/normal_5fc56f44e7ea1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4c2674ec-1430-4cec-a455-d6a35d10586e.filesusr.com/ugd/38955b_89f90d6eea774d1a80974c8a0f7d575a.pdf?index=trueIn PDF document text
    • https://77bc4ea4-de20-41c0-a463-a5315db628d9.filesusr.com/ugd/2c69e3_61885618df944f47b424523372f9bc4c.pdf?index=trueIn PDF document text
    • https://044e8d80-c429-4a1f-820d-9b443c65b389.filesusr.com/ugd/53c654_8de85a7f833b42c7811a25bb20708425.pdf?index=trueIn PDF document text
    • http://bitenozof.atwebpages.com/53300846686.pdfIn PDF document text
    • http://muvekalufisu.atwebpages.com/1213651734.pdfIn PDF document text
    • http://kivozusemu.atwebpages.com/wijipusiserukuzifimed.pdfIn PDF document text
    • http://dopovis.myartsonline.com/22556007109.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF009 5440 bytes
SHA-256: 8f73dcf0982f1caa80fc2e5ac97bbf21d1c4683ff8e32382ad2a4d613a7e16dd
font_01_sfnt_off00010296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10296 2916 bytes
SHA-256: 0a3bcea30e22185279dc02b9e47989594e1b3e344ad73dd1dc8db2fdaf8df636
font_02_sfnt_off00010eed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EED 10872 bytes
SHA-256: 584dac88fdec294dbadee529f8040427b0ca206787102697e28736b68335278c
font_03_sfnt_off00013451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13451 16680 bytes
SHA-256: 354f748726c7f7331735b7746833f6caabea2a943edaa8cf3194fcd1c485f16c