Malicious PDF — malware analysis report

Static analysis result for SHA-256 55a46f8641588591…

MALICIOUS

PDF

68.7 KB Created: 2021-03-27 10:50:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0288aa7307d4db026031c2ee76505782 SHA-1: 97bf9e426ec807b9faf055238fdf70fcf7ba32b3 SHA-256: 55a46f864158859128d50859364ac73c7960dcdddbfaccae7025c91a2fcbb91a
126 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains an embedded URI pointing to 'https://lozipotod.ru/wix?keyword=properties+of+buffer+solutions+lab', which is likely a phishing lure or a distribution point for further malicious content. The PDF also exhibits characteristics of a link farm on disposable hosting, suggesting a broad-based malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/wix?keyword=properties+of+buffer+solutions+lab PDF link annotation
    • http://omoikiri.info/497373019591upsl.pdfIn PDF document text
    • http://13millions.store/patch_fr_batman_telltale58to5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469643/normal_6002a71fe4ba4.pdfIn PDF document text
    • http://metoxegid.mygamesonline.org/character_design_vk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376625/normal_5ffe4feaacd65.pdfIn PDF document text
    • http://zaranes.getenjoyment.net/asthma_pathogenesis.pdfIn PDF document text
    • http://sevoxotedeki.medianewsonline.com/58103587792.pdfIn PDF document text
    • http://show-visitor.xyz/rival_electric_food_slicer_model_1101_8_manualbohkk.pdfIn PDF document text
    • http://jomikifu.medianewsonline.com/75443392337.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469136/normal_600aa8cf92266.pdfIn PDF document text
    • http://fortuneo.biz/ornamental_horticulture_tnauwybex.pdfIn PDF document text
    • http://xonitaj.mywebcommunity.org/newitatowasip.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7ed1f289-57d1-4e2a-9ee4-b64e0eb498cf.filesusr.com/ugd/13dc0c_189a120e50224af3841df8c35c6a421a.pdf?index=trueIn PDF document text
    • http://kijonag.onlinewebshop.net/99579780333.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/36435312126.pdfIn PDF document text
    • https://ae8c1479-5121-4009-b0ed-8259dbb1205b.filesusr.com/ugd/0aff45_6e23dcd9d43a42ee95dae4cc111dbcf4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gudukupir/46980800048.pdfIn PDF document text
    • http://tosurok.myartsonline.com/modle_d_attestation_de_stage.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/16508695649.pdfIn PDF document text
    • https://50aad03f-9d2a-47e6-be13-abd12f321b17.filesusr.com/ugd/3fd638_bff422de48514107924cd7e9aafec00f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/zatufinoruwepesoji.pdfIn PDF document text
    • https://4cf2acc4-d143-4013-a78d-f21de0873c4f.filesusr.com/ugd/e4636f_22e6fcd0d2f94aeda6aaaabe737af73d.pdf?index=trueIn PDF document text
    • http://ligujizulogi.atwebpages.com/92641519868.pdfIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE42 5036 bytes
SHA-256: d7693f96cc2ba678734ba5504ce7e0f4c69080b4d204d594918d1e062303c529
font_01_sfnt_off0000df68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF68 10644 bytes
SHA-256: 56d0e59acc6c09358a1878c1aa9d9c4d92357d7fdf22f654edd8f0de8d1b67db

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