Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ce26f279bd025eb…

MALICIOUS

PDF

73.6 KB Created: 2021-03-29 21:09:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5c11181484f10136e6d770c9632f38d7 SHA-1: 9bc99b6353eea585dfe5597cbb18ded5fe891729 SHA-256: 7ce26f279bd025eb1f32015f7a65cddab94df0f3e3b150b282e9e5cd1bd6c510
214 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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://yafferge.ru/wix?keyword=shreveport+city+marshal+warrants In PDF document text
    • https://static.s123-cdn-static.com/uploads/4530429/normal_5ffd4e7e9d218.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449600/normal_5fe19acbad985.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410702/normal_602f09afcf6f3.pdfIn PDF document text
    • https://cdn.sqhk.co/vovawumusa/gPjSbgj/79653721728.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450731/normal_606158d7e9a83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489587/normal_603c1c480d33b.pdfIn PDF document text
    • https://cdn.sqhk.co/matijamaj/dgfrif6/77294229582.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473926/normal_6050dc14cfc16.pdfIn PDF document text
    • https://cdn.sqhk.co/natefisaka/fgcviiJ/70698073768.pdfIn PDF document text
    • https://cdn.sqhk.co/kipaselofuza/cgcnghD/walmart_steam_gift_card_not_working.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495043/normal_6057cf10cb47b.pdfIn PDF document text
    • https://cdn.sqhk.co/veludewozen/hgTj6hc/emotional_freedom_technique_aka_tapping.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://9305c775-266c-4126-9ef9-90a5cffee957.filesusr.com/ugd/c3f88d_5f842f334e9a4a2cb2a8ddc70bf9129e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef543b8f-db34-4593-820d-2549815fcaa3/no_te_metas_conmigo_traducir_al_ingles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a818a63-616e-479f-aab6-3436ce8ea7b0/how_much_is_fenns_treasure_worth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56cb5c7c-172d-46f6-9887-8b73e21af176/xujetomizaregut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/032d411d-53ff-4572-a0a5-9cf6c07d1201/84120251020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dab42b9a-cbf7-4d88-8552-1df1639459bc/what_is_class_certification_discovery.pdfIn PDF document text
    • https://d6aab468-caab-4d9e-910f-d3bf64ae4104.filesusr.com/ugd/5438e3_343c27738f75475ab474738a1bdd1528.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_off0000d3f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F2 5316 bytes
SHA-256: d272b97637d5739451d26ce3e0e07086dbcf847b15a078527ae5a69d86bd9502
font_01_sfnt_off0000e5ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5EE 10444 bytes
SHA-256: b7a4717e4d90ca10d33cfbb8ba04b27547023deff5a6d0662bbc4fddef14c08f
font_02_sfnt_off00010984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10984 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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