Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e1ac9c38e842375…

MALICIOUS

PDF

71.5 KB Created: 2020-11-25 04:59:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6de783fc1c7f2fc529c4aac93fc233fe SHA-1: d6455bc86300630791b74766ced17a6e98abe95d SHA-256: 9e1ac9c38e842375bdfccd4f06805b6efaed91b88a645dba812cb8bee067d269
244 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to disposable hosting services and appear to be part of a link farm. One of the primary links directs to a known malicious redirector, indicating a phishing or malicious content distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/strik?utm_term=ffxv+platinum+trophy+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4392215/normal_5fa109ebc1b1b.pdfIn PDF document text
    • https://vifaniju.weebly.com/uploads/1/3/4/5/134507083/gares-zofuvapiwag-komazesa-gikezime.pdfIn PDF document text
    • https://nimizinimaji.weebly.com/uploads/1/3/4/7/134703428/volesonikizemipulomi.pdfIn PDF document text
    • https://fefajuvojamunuj.weebly.com/uploads/1/3/4/7/134750085/7835742.pdfIn PDF document text
    • https://tikepewovexa.weebly.com/uploads/1/3/4/3/134317170/5a2386949d.pdfIn PDF document text
    • https://falibapop.weebly.com/uploads/1/3/3/9/133997194/9776380.pdfIn PDF document text
    • https://zajasonasijo.weebly.com/uploads/1/3/4/6/134627958/nurape-lufiwajetogegoz-budexoxolez-gejore.pdfIn PDF document text
    • https://sixumegeb.weebly.com/uploads/1/3/4/4/134476160/zuxewalojefowuwula.pdfIn PDF document text
    • https://sibolapitabake.weebly.com/uploads/1/3/4/4/134469628/nomegubaf_wapafedave_kowek.pdfIn PDF document text
    • https://pojutawetuje.weebly.com/uploads/1/3/1/3/131382470/pategeralipufi.pdfIn PDF document text
    • https://bawapumur.weebly.com/uploads/1/3/4/4/134466187/poruladitisewe-jafigi-zimitiso-pidevojojo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427103/normal_5f9a828b44eae.pdfIn PDF document text
    • https://jozolarameb.weebly.com/uploads/1/3/4/4/134402644/4498421.pdfIn PDF document text
    • https://vunemagerubu.weebly.com/uploads/1/3/4/5/134525741/bamobuduxijevuten.pdfIn PDF document text
    • https://ziwirekow.weebly.com/uploads/1/3/4/5/134529616/3a1d97d48e265.pdfIn PDF document text
    • https://bavejojonosepes.weebly.com/uploads/1/3/1/3/131380601/zuvurakufe.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/47c8cd56-4fef-416c-b1d0-5272a8947b9a/577935682.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA61 5464 bytes
SHA-256: eb11b8472b37c90fba9eb82ed137fe70d51bc83fe983beef4fd452fb789bf9e5
font_01_sfnt_off0000ece5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE5 10732 bytes
SHA-256: 8b9be3a2b492dd55dabac1c9d3938b408ca9025e7218d6319a1c2f8c7aedab31

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