Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d9661936d57c530…

MALICIOUS

PDF

76.5 KB Created: 2021-03-24 01:27:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 64a84b98f4ae126749df8e852eb769cc SHA-1: a1617c85c9c482e28709fea0317ae6f61077f86f SHA-256: 2d9661936d57c530851095dc1abe43f22530822142128eabf552738d223a352b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of external links, indicating a link farm strategy. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The embedded URLs point to various hosting services, some of which are marked as benign, but the overall pattern of numerous external links is suspicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/wix?keyword=william+rodriguez+morrison
    • https://jowavuzawevubab.weebly.com/uploads/1/3/2/3/132303017/ridejovibasu_ketitipu_bapez.pdf
    • https://dajilifu.weebly.com/uploads/1/3/4/8/134891154/lanujetipa_vukoli_ribexalesirov_mixopikasewamal.pdf
    • https://bamupenasod.weebly.com/uploads/1/3/1/4/131410012/6655275.pdf
    • https://kaperimivegorew.weebly.com/uploads/1/3/4/3/134371305/mabajokig.pdf
    • https://zokibiruxe.weebly.com/uploads/1/3/5/3/135326092/9230606.pdf
    • https://sofodifimujinem.weebly.com/uploads/1/3/4/2/134234674/6093067.pdf
    • https://lepopitiw.weebly.com/uploads/1/3/4/7/134762721/kabazolamita.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://68358877-4ee6-4e53-94f7-4bd9665c1f53.filesusr.com/ugd/3bbd68_72aca672c0bf49f1843b31a2b245845c.pdf?index=true
    • https://s3.amazonaws.com/sifawekujiki/xezazeb.pdf
    • https://5ce19dfa-329f-495d-88d1-e1e7834d9072.filesusr.com/ugd/d902bb_9a7f73f6cace4edf8d4a8be5a19630ef.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4bf8db47-be2e-45b1-a0bc-fa5fffbafabc/sears_roebuck_catalog_homes.pdf
    • https://d90bda3b-35dd-409f-9d4b-b4a00d881a52.filesusr.com/ugd/b88e3d_c57cabb7d9b046d8945c355bc8de486e.pdf?index=true
    • https://s3.amazonaws.com/kisagoz/figaviwapid.pdf
    • https://uploads.strikinglycdn.com/files/783d9f10-a76e-4c65-a7a3-ad1ea18a2d41/how_to_clean_out_brine_tank.pdf
    • https://65fca3b3-7ce8-4d56-9bc8-ebe46cc5223b.filesusr.com/ugd/f6ed72_b54e511bcabd4cd0a6fdeb8d8bad1e41.pdf?index=true
    • https://f1e11ea9-a931-46ad-af30-391325c877dd.filesusr.com/ugd/423518_dfb88c565dad4e059723b45f738c38c9.pdf?index=true
    • https://s3.amazonaws.com/xowasosuf/boom_beach_hack_mod_apk_2018.pdf
    • https://uploads.strikinglycdn.com/files/6f73d14d-35b0-40b9-b9e6-71cf53e8f6f3/49274859838.pdf
    • https://9f4ad419-87ad-4507-9b23-40b7c7395cc9.filesusr.com/ugd/55478e_e051e6e00cc74a8fb66cb91c2cff4a58.pdf?index=true
    • https://uploads.strikinglycdn.com/files/061f32a1-9f40-40f8-acb3-b631c155a019/zividuveridufawewutif.pdf
    • https://uploads.strikinglycdn.com/files/fe07e8b9-ed70-4de0-b138-6422b8b0bf7a/gemumuparazilijofuwitebi.pdf
    • https://44f39d5c-a655-4437-91b6-62b11e148e71.filesusr.com/ugd/eb4c03_0ff307b472c74f2681097649c3531c45.pdf?index=true
    • https://e4034479-4ead-418b-af8c-5be8dc72bdbe.filesusr.com/ugd/1e8759_848190cd86b04a1d947810e1dfac32a1.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed55.bin
f0f44cf3bbed693b7d7552bb443b5272326a934cf3147f41e00b87b0a523d6d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED55 5208 bytes
font_01_sfnt_off0000ff0a.bin
54617dd302203d57292251f11d6d143acca39fab16650c518d652a769a1ee768		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF0A 11108 bytes

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