Malicious PDF — malware analysis report

Static analysis result for SHA-256 1061b1fe6785eb2f…

MALICIOUS

PDF

71.1 KB Created: 2020-12-23 01:07:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 9be682a1159a330a998270c8469ee9bb SHA-1: 19801021e87b011ddc2a4ca2afb2c78761937ce4 SHA-256: 1061b1fe6785eb2f26caf4938f249841796db7a9d9a54070faebbc4eb78b94a5
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier indicate malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffnew.ru/aws?utm_term=gonorrhea+treatment+guidelines+cdc PDF link annotation
    • https://mimudokax.weebly.com/uploads/1/3/4/7/134742140/dabezuper.pdfIn PDF document text
    • https://vizomitula.weebly.com/uploads/1/3/4/2/134266598/374000d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465277/normal_5fcc8bdd80950.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367937/normal_5fd8f0e9d1aed.pdfIn PDF document text
    • https://sirawomaperuli.weebly.com/uploads/1/3/1/3/131398091/wovojojovisusukit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419192/normal_5f9a059677ca4.pdfIn PDF document text
    • https://rikurifijuse.weebly.com/uploads/1/3/4/6/134681474/4130a012120f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459787/normal_5fddfedf9550f.pdfIn PDF document text
    • https://fugomunufu.weebly.com/uploads/1/3/4/5/134586131/kofogimetuvube.pdfIn PDF document text
    • https://lozezuxugi.weebly.com/uploads/1/3/4/0/134016676/bapabewexububo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/19b6cb7f-ca97-4d7e-92be-f2e062f294dc/mikuwamenosuwumikezo.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/saxaf.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://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c3a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3A9 5384 bytes
SHA-256: fe6c90a513d6c54bcbedb5b689d26846f19b05459d97c62d00c9f04fbb349b78
font_01_sfnt_off0000d5bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5BF 8208 bytes
SHA-256: 1b6cbe2ba47ce48bdc2792016051f89ef20b5ca6ca45c6feebccabf3941f9139
font_02_sfnt_off0000ecc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC6 10072 bytes
SHA-256: c4570a5228e178d67ec4fb9c3973a339f518209c5ba698f16f5111a708ca6d8f

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