Malicious PDF — malware analysis report

Static analysis result for SHA-256 78c57288b3886f72…

MALICIOUS

PDF

110.4 KB Created: 2020-11-14 08:19:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: eec62e3751eab1cf3f2cf6114d103c0d SHA-1: dd95e3ec3d5bc27023ce0a54d839ab9fdccaa64c SHA-256: 78c57288b3886f7277a65c354b0c53f9e4eac927516776a4e722a27a7483d1f3
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 0.9994

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://trafftec.ru/strik?utm_term=samsung+hw-f355+soundbar+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370533/normal_5f98ca7a7b34f.pdfIn PDF document text
    • https://xavoxoxuda.weebly.com/uploads/1/3/1/3/131379246/farebukatefa_wodusave_pisalepiz.pdfIn PDF document text
    • https://letitunonagafi.weebly.com/uploads/1/3/4/4/134494227/namari.pdfIn PDF document text
    • https://kugodago.weebly.com/uploads/1/3/4/4/134491336/2383751.pdfIn PDF document text
    • https://baxojozejaxofo.weebly.com/uploads/1/3/4/5/134586757/9850777.pdfIn PDF document text
    • https://tibiwurab.weebly.com/uploads/1/3/2/6/132695994/5341355.pdfIn PDF document text
    • https://pojutawetuje.weebly.com/uploads/1/3/1/3/131382470/mijapomigaruxoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416671/normal_5f9e737633048.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386330/normal_5f94743ced4f4.pdfIn PDF document text
    • https://zumukematil.weebly.com/uploads/1/3/4/7/134716366/383fb070.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/vabobivujuzir.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014bb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BB1 2900 bytes
SHA-256: 68d094faf81d2ea9f62e68ee4e789e40b6192f27e323b9e50c58fbaa8f881837
font_01_sfnt_off000155f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155F4 5976 bytes
SHA-256: a85519ac98e46a9960f34ab1ca36df1f9958c4639e12f20f389d04e4e0c84fd3
font_02_sfnt_off00016a3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A3B 13664 bytes
SHA-256: fd991561b3684af263346fc9f41d021afffd32bf2649a5b8a30b85936efc39b0
font_03_sfnt_off0001974a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1974A 16076 bytes
SHA-256: e619a639363efb8a8c499d9b10964d1cd014b9e04bc729d500f2b798c8236684

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