Malicious PDF — malware analysis report

Static analysis result for SHA-256 d29368c4951475b8…

MALICIOUS

PDF

93.6 KB Created: 2021-03-05 12:37:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: a714e676a6e8b2f11a27931ddf59757e SHA-1: bf9d8aa6990eaaded55fbeed98803e2fe996364e SHA-256: d29368c4951475b8c7d687632effe6738955e860000727e40102211b4e905dc8
186 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. Heuristics indicate it functions as a link farm, containing numerous external URLs designed to redirect users. The document body, though heavily obfuscated, contains references to 'fiery ferments pdf' and application metadata, suggesting a lure to external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://pelibifir.ru/wix?keyword=fiery+ferments+pdf PDF link annotation
    • https://cdn.sqhk.co/zotevokep/fjMgewa/smart_balance_light_olive_oil_vegan.pdfIn PDF document text
    • http://duplicwcnj.space/49071565674su50s.pdfIn PDF document text
    • https://cdn.sqhk.co/kasuvapexal/B1hfqic/likugitisemekenepisamakeb.pdfIn PDF document text
    • https://lozusometuzasop.weebly.com/uploads/1/3/4/7/134741376/tokax.pdfIn PDF document text
    • https://cdn.sqhk.co/sovokeduseb/S3M9gd6/39596161951.pdfIn PDF document text
    • http://presalon.xyz/fasugufefami2zpy6.pdfIn PDF document text
    • https://fidimamafiw.weebly.com/uploads/1/3/4/6/134624465/6d4fe8f.pdfIn PDF document text
    • http://vashe-zdorovie.xyz/avery_labels_template_51621xv4d.pdfIn PDF document text
    • http://hrushch.space/android_10_oneplus_7_pro_stableyrqlm.pdfIn PDF document text
    • http://testrun.ru/transformers_beast_wars_season_1_characters3pkbc.pdfIn PDF document text
    • https://norofuzalugegok.weebly.com/uploads/1/3/4/8/134882219/gupaxatowoga.pdfIn PDF document text
    • http://organic-ita.space/solving_linear_inequalities_worksheetlt9hj.pdfIn PDF document text
    • https://kaginugopaz.weebly.com/uploads/1/3/4/3/134310825/xajogixaw_xoporo_fapunexugut_padosupepakuga.pdfIn PDF document text
    • http://balifruit.com/26620494565zch8p.pdfIn PDF document text
    • https://gedolumu.weebly.com/uploads/1/3/4/7/134761272/8282161.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://69b3109a-7cce-4514-9193-d2106d9976ab.filesusr.com/ugd/3c2969_87d1f72b2c4e432fbb1f4cb91be362ef.pdf?index=trueIn PDF document text
    • https://6ba812fd-7407-468e-a879-d7284e591ed6.filesusr.com/ugd/31a575_77f3220bf75147898af2465a2fb2e63a.pdf?index=trueIn PDF document text
    • https://5663e088-3595-439c-971a-5873693bee35.filesusr.com/ugd/e98895_5daabd8c74e14d9cbd34ce39e8f6a2a3.pdf?index=trueIn PDF document text
    • https://e6b56e3c-1b88-4cfb-972d-ab1702b0a06e.filesusr.com/ugd/8c0e65_02771e3ae3b9477680939beed027661d.pdf?index=trueIn PDF document text
    • https://a86a6b26-b473-4b55-b9aa-7628a2bff077.filesusr.com/ugd/4f270c_7f1330bf78254701abf5baca75b79465.pdf?index=trueIn PDF document text
    • https://9e2bb560-353e-4f5d-a08b-1363560edab4.filesusr.com/ugd/6c032c_60a9268606f24d618998b01977f47ac6.pdf?index=trueIn PDF document text
    • https://7ef7ebf0-bcb0-4ca2-8538-5a19c3e9f01c.filesusr.com/ugd/aff7ca_3f4d09c4b5a74da9aecaf4efd2625aa1.pdf?index=trueIn PDF document text
    • https://8d67285a-e3c5-4820-bb1a-bb91ce1079a6.filesusr.com/ugd/d54300_6ed41090eb0c4c11b8b206fd81ec1c24.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00014cc1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x14CC1 18180 bytes
SHA-256: fc9353c3a2364d3655cb17c3803c4aebb020528663f3c28c495188c6a45bfcd2
font_00_sfnt_off000117be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117BE 5000 bytes
SHA-256: 6aaf7a6b449c54c7843fc7052f0461c0218baf976fa02ea5772adcb8b30f0fa9
font_01_sfnt_off000128bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128BB 10492 bytes
SHA-256: 69dcadfcf61ea0307c8743b03ffd7aa468a5860a8a054560162e515a5f2c45bf

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