Malicious PDF — malware analysis report

Static analysis result for SHA-256 94a09f6130c59465…

MALICIOUS

PDF

68.9 KB Created: 2021-04-03 08:19:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74c2d5301889c8cc64743d364e22287d SHA-1: 285663232c3a4b187fee959f02ae0af4a0a21dcd SHA-256: 94a09f6130c594656fb5215e8615cbacaa77ef1ac65f348b98be6ca9b76e648a
156 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one primary malicious URL identified. The heuristic 'PDF_SEO_LINK_FARM' and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded URLs suggest an attempt to redirect the user to a malicious site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/award?keyword=digestion+perfecta+deepak+chopra+pdf+gratis
    • http://sopafekidis.sportsontheweb.net/58166808088.pdf
    • http://mebotus.mypressonline.com/digalifidugigunaxasazepew.pdf
    • http://vonexalux.sportsontheweb.net/learning_disabilities_characteristics.pdf
    • http://doxedisipi.scienceontheweb.net/53896371047.pdf
    • http://sidufapas.mywebcommunity.org/jizovigoj.pdf
    • http://gatowixipeba.mywebcommunity.org/buxufu.pdf
    • http://zonerokemub.getenjoyment.net/gakunuraxo.pdf
    • http://rofuxipof.mywebcommunity.org/atividades_de_alfabetizao_vogais.pdf
    • http://zunuruxeguxifi.mygamesonline.org/disegilozobelovozogi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://ae8c1479-5121-4009-b0ed-8259dbb1205b.filesusr.com/ugd/0aff45_22fef5a9a11e43a2b18849eefbdee22d.pdf?index=true
    • https://s3.amazonaws.com/xuvamuba/how_to_measure_mw_cm2.pdf
    • https://s3.amazonaws.com/rabewiruzitewa/kayla_itsines_intermediate_workout_no_kit_full_body_session.pdf
    • http://dogiwexor.myartsonline.com/61766201677.pdf
    • https://14864a69-2465-45da-a912-c6f78a3f99b9.filesusr.com/ugd/409ca8_9fba00c97b3d4313b85110485efbeedd.pdf?index=true
    • https://s3.amazonaws.com/wegugus/toro_leaf_blower_vac_accessories.pdf
    • https://24d1f61b-f5c5-4d2f-8180-62589f44e8d8.filesusr.com/ugd/eed56f_f9b19fbf91204ca28f18daa63e674d9a.pdf?index=true
    • https://s3.amazonaws.com/kobivimelelo/it_service_transition_plan_template.pdf
    • http://nununad.myartsonline.com/97977008270.pdf
    • https://s3.amazonaws.com/tezofuretejom/jackbox_quiplash_best_answers.pdf
    • https://s3.amazonaws.com/legesiliv/how_to_set_mr_coffee_clock.pdf
    • https://11ab4cf5-156d-4417-99e9-5039b2a7eb5f.filesusr.com/ugd/82d61e_044725a7e54c4b8491911e27926406be.pdf?index=true
    • https://s3.amazonaws.com/tobaziw/vocabulary_test_elementary_level.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_off0000cef0.bin
88bed0eff3b906647c980a43a467e07e30f8126918a964d319f1c864131ddccb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF0 5448 bytes
font_01_sfnt_off0000e17e.bin
a8b94366db79a7411784cabe4dd7751b528f91a4dd8dfb1558f48f9d7bbbddcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE17E 11068 bytes

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