Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d3adb98a2803d18…

MALICIOUS

PDF

82.8 KB Created: 2021-03-15 22:58:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 5ad421dc598dc25ab7a1258cc4a56097 SHA-1: 860b39c805ad4a7c473bb7dea53f07b04ba8145a SHA-256: 0d3adb98a2803d1803f432994f686ccddc0484fd8b0387e622dfd8d99548fe1d
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 pointing to disposable hosting services, indicating a link farm or SEO spam operation. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://nipisod.ru/wix?keyword=west+bend+stir+crazy+instructions PDF link annotation
    • https://kunamugak.weebly.com/uploads/1/3/0/7/130739026/kutuli.pdfIn PDF document text
    • https://xazulifego.weebly.com/uploads/1/3/4/7/134727283/pisigitiw-jojolabemi.pdfIn PDF document text
    • https://mekegeno.weebly.com/uploads/1/3/1/8/131856852/fa00dc6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382973/normal_5fc5db7173c9b.pdfIn PDF document text
    • https://cdn.sqhk.co/molipigi/he0yji6/fanimuxevosiwajabagabu.pdfIn PDF document text
    • https://cdn.sqhk.co/dudilirugido/c5pghHR/50453071438.pdfIn PDF document text
    • https://sejoxamopizava.weebly.com/uploads/1/3/1/8/131858661/tuxuresutobazab.pdfIn PDF document text
    • https://suwisabinupa.weebly.com/uploads/1/3/5/3/135351097/kusogakum.pdfIn PDF document text
    • https://mimevomakiket.weebly.com/uploads/1/3/4/6/134693464/2568353.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495413/normal_5fe1731f728b4.pdfIn PDF document text
    • https://tonefomemozev.weebly.com/uploads/1/3/4/4/134458928/061f868480b26.pdfIn PDF document text
    • https://ramakizuwag.weebly.com/uploads/1/3/4/3/134321509/xexosinerigurabeje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424043/normal_5fe89d1fa5ffa.pdfIn PDF document text
    • http://vkysnaya-eda.site/pogejufugodupilimerh3oe1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469370/normal_60268a2ace13a.pdfIn PDF document text
    • https://rapusixub.weebly.com/uploads/1/3/4/6/134631860/d0283.pdfIn PDF document text
    • https://koxizekeb.weebly.com/uploads/1/3/4/7/134770308/6a37b0dd935.pdfIn PDF document text
    • http://artistichomesolutions.com/pumugogejuvuxakasn15j4.pdfIn PDF document text
    • http://santand-es.com/gevasaruvobegigukaopo8w.pdfIn PDF document text
    • http://help-service-support.com/6465824201922ux2.pdfIn PDF document text
    • https://cdn.sqhk.co/jonilinenuvo/jzDfIKq/star_hero_story.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://e9abb47e-19e5-4ec2-9f3c-2aa4e6f2bf0a.filesusr.com/ugd/92be99_c0f9ccf29ec34335894da22eef441afb.pdf?index=trueIn PDF document text
    • https://d1159ab4-cbf5-42eb-897b-83a5e94cd7da.filesusr.com/ugd/536122_ef29e33c7c3e4440aed1b2f32a4db985.pdf?index=trueIn PDF document text
    • https://40785fcd-1e5e-4316-9306-5db1d5795eae.filesusr.com/ugd/2f07a1_21ca9ed2e2ad40f4a4cf407575992268.pdf?index=trueIn PDF document text
    • https://47e4df30-8702-49a4-8bd5-327e1546ff06.filesusr.com/ugd/379272_f17c1646c9824d0daaa9e555f82e02c5.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BC 5088 bytes
SHA-256: 314fe920fad71e077e55bc8d9e286bb638dcd4c03da3b30de819264d375ee13b
font_01_sfnt_off0001071c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1071C 11508 bytes
SHA-256: 6e1e1cf1fae4268613dc40ae4f9d3bb384ccb88f44b2ff9a9e53f114ed769be6
font_02_sfnt_off00012dd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DD6 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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