Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed4b9d35d17b3b37…

MALICIOUS

PDF

71.8 KB Created: 2021-01-03 00:13:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 64671c48bc605013868983dac2d176c3 SHA-1: 6ab78071871896e2201a5132fb4b8cdf5bb649c0 SHA-256: ed4b9d35d17b3b37b4f6996c20a616aa977beacd1ebfe8389dbc2aa5fa3ffab7
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://trafficel.ru/123?utm_term=ain%2527t+no+sunshine+harmonica+tabs PDF link annotation
    • https://letitunonagafi.weebly.com/uploads/1/3/4/4/134494227/3440429.pdfIn PDF document text
    • https://jekowidemovo.weebly.com/uploads/1/3/4/7/134702183/guxufovamulon_kezibusepakura_wegewu_volaxenexan.pdfIn PDF document text
    • https://pukewuvidepuf.weebly.com/uploads/1/3/4/3/134321324/6533318.pdfIn PDF document text
    • https://nezozavigarej.weebly.com/uploads/1/3/4/7/134727028/8255625.pdfIn PDF document text
    • https://tunugezujemis.weebly.com/uploads/1/3/4/3/134307821/eb5fa837079a48.pdfIn PDF document text
    • https://jajaleregonu.weebly.com/uploads/1/3/4/2/134235513/3c859.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416940/normal_5f94e4a9cb509.pdfIn PDF document text
    • https://pilidikuvitas.weebly.com/uploads/1/3/4/7/134766888/gibuvevenafokes_mololuwuju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391327/normal_5fc0d6acb6112.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410416/normal_5fe7e807d2a0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445555/normal_5fd34ca89f487.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8d23e56-e633-43b5-98d9-353711b2dc3c/24153608486.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85c51cda-9e47-4385-8e09-829da8bdbd32/refilaz.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_off0000baa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAA5 5172 bytes
SHA-256: 29d545d9d1ae48beee8c9e753d84cb04e1f92cce10b724ec393d135b4d31f7dd
font_01_sfnt_off0000cc0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC0D 2840 bytes
SHA-256: b922c8ad0280cf3ab0dda8b24e0cece3b0affba627cce6725ba1e9ad4bcf6b5a
font_02_sfnt_off0000d7d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D2 10608 bytes
SHA-256: 5e4dd151d5b6d2bd548d7b2b9546d89f432396821eb5a5d66baae63ec600ee8e
font_03_sfnt_off0000fc0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0B 16372 bytes
SHA-256: 01c77c490ac9d00ca23615d71c270f22a0b8b896bccb91146e7209e5edaa68be

Open this report in the interactive analyzer, or submit your own file for analysis.