Malicious PDF — malware analysis report

Static analysis result for SHA-256 748d0e78e6c760f4…

MALICIOUS

PDF

90.4 KB Created: 2021-03-29 21:02:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 30fd005eaec4173d5794e3d030482cea SHA-1: b86df8e5693ddb8466e0bb45c7e23be8314bba74 SHA-256: 748d0e78e6c760f4a2924c770e2eae3cdcd4509294cc284ce741f83247da34c9
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The embedded URL and the heuristic firings indicate that the document is designed to redirect users to malicious websites, likely for malware distribution or credential harvesting. No scripts were extracted, but the PDF structure itself is used to host and present these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://maypoin.ru/strik?utm_term=monster+nicki+minaj+verse+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387931/normal_60621358ce535.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489607/normal_5fdc29f01b07f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368745/normal_5fdfb1bbbb7c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407756/normal_604ce2be0e5f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467975/normal_5ff87f6a4df09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447096/normal_602b4cb05685e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405414/normal_60152db5ea9fe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445541/normal_60067f33c0e5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454426/normal_601efda4e49a8.pdfIn PDF document text
    • https://rugekake.weebly.com/uploads/1/3/4/5/134518704/foxobopixavuda_kivovo_xelov_kimebivinuxumam.pdfIn PDF document text
    • http://dosijefa.mypressonline.com/46434280355.pdfIn PDF document text
    • https://vifixizunegivu.weebly.com/uploads/1/3/4/3/134349865/64f9425104f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384820/normal_5fd644f5bef00.pdfIn PDF document text
    • http://bekopomulasebi.getenjoyment.net/nofafolaneximiwolasamaf.pdfIn PDF document text
    • https://falojabuvo.weebly.com/uploads/1/3/4/7/134774067/063c9ebd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402261/normal_6025f2bd345a8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488349/normal_5febd247a6bd1.pdfIn PDF document text
    • http://dimozakebaba.scienceontheweb.net/rabbit_digging_holes_in_yard.pdfIn PDF document text
    • https://bisojobiregabo.weebly.com/uploads/1/3/4/5/134509607/tozurigisojimiloxa.pdfIn PDF document text
    • https://lelidejob.weebly.com/uploads/1/3/4/6/134643066/2816863.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453740/normal_60587ab84c365.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jutagejefutix.atwebpages.com/34543466156.pdfIn PDF document text
    • http://purewowesajumu.myartsonline.com/ruvulupewawusarimisus.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
    • 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
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e93c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE93C 6812 bytes
SHA-256: ebfc6ae9101a580b251f18edb4f130d6b8a0a69f7e0152a464433f4f38f834d3
font_01_sfnt_off0000fa73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA73 5380 bytes
SHA-256: 50a8ef23b3a7cf4e7872ce5a9e1b46cc8a660431cf0015b1ab5987608aae5e93
font_02_sfnt_off00010cc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC4 4204 bytes
SHA-256: 86de6881757b3419845ff56e9872527f0874c3195fd0664919cc4dc1608a126d
font_03_sfnt_off00011ca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CA6 11584 bytes
SHA-256: 06346b8cead083251ca45ac0ab3f57c0f58250735583ee5eb2ddb1adb2c96c51
font_04_sfnt_off00014454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14454 16548 bytes
SHA-256: 3c46f178cd67880b94d2e6f643f5e5b8ab5d7ff010477c199acd314d98049c5a

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