Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e7b8fe0e3122d4f…

MALICIOUS

PDF

76.1 KB Created: 2021-05-12 15:20:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1e8aad8245a14906311122d1721d6d7f SHA-1: 58557f9da0a83ac99ee4bf0159d0f90588809de3 SHA-256: 2e7b8fe0e3122d4fd5f707286d9dc4b0d4e8b060e14cfd59d4fa6240cf3e3155
186 Risk Score

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 0.9995

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://jottigo.ru/strik?utm_term=tommy+emmanuel+guitar+book PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4485156/normal_600ba06abffd0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489734/normal_6017a50e6cea0.pdfIn PDF document text
    • https://cdn.sqhk.co/xojelumegasi/jeeXza0/learn_c_free.pdfIn PDF document text
    • https://cdn.sqhk.co/tixunadegu/YGrwhjN/attunity_oracle_connector_performance.pdfIn PDF document text
    • https://cdn.sqhk.co/muxigatatini/ghdBEJI/16529138518.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480743/normal_5fe4fb4ccddad.pdfIn PDF document text
    • https://cdn.sqhk.co/nisisepolo/u9ieTjj/11981350774.pdfIn PDF document text
    • https://cdn.sqhk.co/luwesefizi/sifjirR/ball_quest_destiny_2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369769/normal_601bb865a4818.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://5ac9d038-517d-4536-97f6-676423289421.filesusr.com/ugd/b444d4_cacba9ab7e5b41e1bd46146d337c3f2d.pdf?index=trueIn PDF document text
    • https://2a085669-a8dc-40eb-b1d3-71ea9d660f60.filesusr.com/ugd/cafc24_872426cded75486a9fa4a169f65b0ee0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6587f556-efe6-4bc2-b139-51abc4bc7275/dopepamutemadir.pdfIn PDF document text
    • https://2080fafa-2491-4ac3-8118-a138f33bff34.filesusr.com/ugd/822ecd_46ab39ee8fac4617b54da0085948d7a1.pdf?index=trueIn PDF document text
    • https://be5a03d2-cb36-429a-bb4d-4773f067dd3b.filesusr.com/ugd/b46ca8_1a755a38d76b402e854d598281f5db62.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b02bed66-b8b5-4b2e-b363-15cb040c5a22/56149410524.pdfIn PDF document text
    • https://1237a3da-0b33-4890-9ba9-974507bf2590.filesusr.com/ugd/3e0cb9_3d10fb3f29c24706ae9d93f934c8178e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a86e8cf6-4f0f-4794-9547-e8a3c70ca166/what_is_the_purpose_of_a_general_warranty_deed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d75e90d-0d7b-4d05-b8d2-e5ad122ade70/how_did_thomas_die_bible.pdfIn PDF document text
    • https://7ec9ed57-df89-401a-953b-45744c150cee.filesusr.com/ugd/6e3131_03cdb4db634948c98309a98e692a3e07.pdf?index=trueIn PDF document text
    • https://b03e51a8-7171-48c0-94d6-e4c032e6f37f.filesusr.com/ugd/9421c8_57b10af4cc604ff69ae07b09fa903763.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4248bd4a-9953-47b5-bcd1-7b3413693bc7/27383632394.pdfIn PDF document text
    • https://8ed6bd9f-de2b-4923-b7df-82f95eb18a03.filesusr.com/ugd/7fa32f_211b37a46b5e4457ad8bf9cb76be9d99.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_off0000dccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCD 4964 bytes
SHA-256: d73ccfbb65985394da62e5b5cb05a91a4108efdbe687f32d22ecbd736a81c0ab
font_01_sfnt_off0000eda7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA7 11440 bytes
SHA-256: 725383f215068877b8a2174687b4150242fed9267983f511eb89f857b49f3c14
font_02_sfnt_off000114a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114A6 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361