Malicious PDF — malware analysis report

Static analysis result for SHA-256 daffafe1299a18d7…

MALICIOUS

PDF

71.0 KB Created: 2021-03-18 02:19:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7ba9f1aba15ee64f8351b06bff3244a9 SHA-1: dca03e9253970edb1caa6afa07ab2487f4f7e806 SHA-256: daffafe1299a18d759ac6710bff157a80c8270444955ae2c2f8c3e95e6b45f2f
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 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/wix?keyword=chihuahua+puppies+for+sale+in+williamsburg+va PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386593/normal_5fda7907eafbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368756/normal_5fea25975aa2a.pdfIn PDF document text
    • https://tonusawojojumo.weebly.com/uploads/1/3/1/3/131384735/wujokedesef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500208/normal_5ffba3ad38dba.pdfIn PDF document text
    • https://warasogufav.weebly.com/uploads/1/3/4/4/134440103/9492062.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366000/normal_5fe3117537b50.pdfIn PDF document text
    • https://tapuwapefozex.weebly.com/uploads/1/3/4/3/134350869/virimafameban.pdfIn PDF document text
    • https://pelosewedi.weebly.com/uploads/1/3/4/7/134753512/168cc182bd456.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418993/normal_6043f53c27b2a.pdfIn PDF document text
    • https://xuvuvigaxopezut.weebly.com/uploads/1/3/4/7/134721928/sakapakelel_wukizivekag_kelopakale_mijuxejalodix.pdfIn PDF document text
    • https://wuwabisa.weebly.com/uploads/1/3/1/6/131606234/jasovuned_wajomijim.pdfIn PDF document text
    • https://pukaxixuzex.weebly.com/uploads/1/3/4/4/134492253/cac13a2329.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422144/normal_5fcddc2c58c94.pdfIn PDF document text
    • https://peziwotikiju.weebly.com/uploads/1/3/4/6/134602895/tavexekud.pdfIn PDF document text
    • https://tafuposavibado.weebly.com/uploads/1/3/4/0/134017079/669f05.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/6bc19d1f-2de1-4995-af8e-2a0c562e0f11/aroma_arc-914sbd_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b362a9a-3b1f-43eb-85fd-6176e817644b/dikufedolokefuzigojuwok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9abdd5e1-674a-486d-85c9-72062d60d963/fakumafulixigavobijeda.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_off0000d70f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD70F 5512 bytes
SHA-256: c4b836856e10e68deb7a2015b8651fb21443c093c1973f39cc1f10f14f0a2540
font_01_sfnt_off0000e9b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B8 10844 bytes
SHA-256: c6374ec173e985853ddc07ed6b03c4c6ec6d3a190466bb87596724e7d44390d0

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