Malicious PDF — malware analysis report

Static analysis result for SHA-256 92a353c4489d857b…

MALICIOUS

PDF

159.8 KB Created: 2021-03-15 04:13:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c45f1449993f9b8d8f14971d552fcb15 SHA-1: 53640ebe0681489631e7d6dbed9232359d501e54 SHA-256: 92a353c4489d857b5701440aaa55e52669c8d3e2797ff3d95329e81410218244
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded URLs, with one specifically identified as a potential phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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://midufefew.ru/award?keyword=toyota+operations+management+case+study+pdf
    • http://gewebufokorilu.iblogger.org/xelesodidewikavujizovo.pdf
    • https://cdn.sqhk.co/zovaratigu/Djd1zhc/dragon_land_colorado.pdf
    • https://binufigelivu.weebly.com/uploads/1/3/4/7/134775083/716e6c7.pdf
    • https://cdn.sqhk.co/wepunajexiju/NA0iiKc/wilusedo.pdf
    • https://static.s123-cdn-static.com/uploads/4427105/normal_5fe535b83cedd.pdf
    • https://palegovod.weebly.com/uploads/1/3/1/0/131070329/zijukixade_fabafive_vuvukut_peris.pdf
    • https://cdn-cms.f-static.net/uploads/4480758/normal_601fef7b63628.pdf
    • https://cdn.sqhk.co/rapawaferew/ahdtACf/jonofibiniv.pdf
    • https://dubuweni.weebly.com/uploads/1/3/1/6/131637072/8764cd5.pdf
    • https://static.s123-cdn-static.com/uploads/4382186/normal_5ff1045a2d9d4.pdf
    • https://nufazuxumojo.weebly.com/uploads/1/3/2/8/132815750/8baea13e3fea.pdf
    • http://podekupe.22web.org/tofaxewimedagugofuwiluj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://5be7aec3-7d66-433b-ae1d-2bfb807ddf2a.filesusr.com/ugd/24deb6_42d09ee9721c4e7f86bcdc7f1967d184.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9869da46-0b8a-4308-9f23-75b267b07d92/how_to_take_apart_a_whirlpool_thin_twin_washer.pdf
    • https://e7e1611e-f78d-4dfd-b5ce-3be5f579732f.filesusr.com/ugd/4b76a6_683f28de3528434abe2af96db9b2eda5.pdf?index=true
    • https://uploads.strikinglycdn.com/files/e3f335e4-8dc6-440e-bf78-2b8ba2587be9/77806169280.pdf
    • https://uploads.strikinglycdn.com/files/7693cb85-3387-432b-b5d8-7930ccc4cf91/formula_acido_cloridrico.pdf
    • https://07a970a6-a864-461d-ba0c-8deda34efc75.filesusr.com/ugd/b56c0d_a110205e65e947888cc534cf83c76825.pdf?index=true
    • https://93bb5028-8b17-4c47-8ab9-f46a024b0e86.filesusr.com/ugd/041612_e666a98151bb416d9c864aaa013b7505.pdf?index=true
    • https://90ff81fc-98d9-4e53-96a3-aaa5c1c2042e.filesusr.com/ugd/bb5aff_10f493bfca7349008b003213e4209db6.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f3535d92-7936-460b-aa5e-8c44e1a21758/11_22_63_hulu_parents_guide.pdf
    • https://uploads.strikinglycdn.com/files/4b12e246-1257-4cf6-a2c4-60c04a339782/kimifojalusokukopetos.pdf
    • 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_off000236bb.bin
e476cb606f6bbbc14d5408a56b8efa123d30f1db214749dc852fca083eac9957		 pdf-font-stream PDF embedded font (sfnt) at offset 0x236BB 5496 bytes
font_01_sfnt_off00024964.bin
317c4fedb1241beb1de3b64bcf431fe566fd35489248ca103991e62b9b9758de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24964 11828 bytes

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