Malicious PDF — malware analysis report

Static analysis result for SHA-256 654bc3f321779e9d…

MALICIOUS

PDF

82.5 KB Created: 2021-03-24 12:16:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29d72b6dbb8f135ffe01b6c1e4d2b673 SHA-1: e320718f22440e16fd4c2b2b8317958a6b8c36f6 SHA-256: 654bc3f321779e9d5d000633e4e6335c2cc114e00874b7bb61dab1f4497115ad
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm. The PDF contains numerous embedded URLs, many pointing to disposable hosting, suggesting an attempt to distribute phishing content or malware. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with common phishing lures.

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://resalured.ru/wix?keyword=the+pattern+%2526+the+prophecy+god%2527s+great+code+pdf
    • http://kafujaguvo.mygamesonline.org/how_to_use_phone_as_tv_remote_control.pdf
    • http://jiwapadenejeza.getenjoyment.net/acurite_rain_gauge_setup.pdf
    • http://mitimewigupito.mypressonline.com/61223659297.pdf
    • https://datipozor.weebly.com/uploads/1/3/0/8/130813945/cdb398a.pdf
    • http://fomoregekamikat.mypressonline.com/vizanera.pdf
    • http://kogejirupu.getenjoyment.net/fefuteruzibikob.pdf
    • https://widosogepe.weebly.com/uploads/1/3/3/9/133986955/gakidejos.pdf
    • http://rekararavufi.iblogger.org/what_engine_is_in_the_maserati_granturismo.pdf
    • https://cdn.sqhk.co/madufuxenuw/gVwGqih/brazil_2014_simulator.pdf
    • https://xafosaxit.weebly.com/uploads/1/3/1/8/131859261/maxiniresik_xulima_milujitakumowo_gepuresata.pdf
    • https://cdn.sqhk.co/gofelaxes/c4xjeig/dikip.pdf
    • https://jovinafunen.weebly.com/uploads/1/3/2/6/132695325/f4efd52166.pdf
    • https://cdn.sqhk.co/zasokolof/geiiwif/idle_arena_evolution_legends_cheats.pdf
    • https://cdn.sqhk.co/manuguwe/hfjcnP7/893433937.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lukoleni.epizy.com/pelodusosawoxazatejuzus.pdf
    • http://lexogevifuba.rf.gd/mitogopeta.pdf
    • http://sejojoxo.epizy.com/babelaneti.pdf
    • http://situwosase.myartsonline.com/marginal_from_joint_examples.pdf
    • https://s3.amazonaws.com/zomuzigo/2611664802.pdf
    • https://s3.amazonaws.com/topipovikapari/how_to_collimate_celestron_binoculars.pdf
    • https://s3.amazonaws.com/libusamagowuvo/earpods_with_lightning_connector_user_guide.pdf
    • http://zisukuvi.atwebpages.com/what_is_the_definition_of_lattice_enthalpy.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f188.bin
5b9fd343a1d8c7fbb288aff4a3bc67dc2d25b74ecb1a46555b6a5a67b2a30834		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF188 4648 bytes
font_01_sfnt_off00010149.bin
366ce7a9616d2fd01c055031d21ee3884ba508149284caed8e341092baf140ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10149 11192 bytes
font_02_sfnt_off00012773.bin
e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12773 16204 bytes

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