Malicious PDF — malware analysis report

Static analysis result for SHA-256 e987e64c971dcbcd…

MALICIOUS

PDF

83.5 KB Created: 2021-03-23 17:43:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: e89656bf50a97ee930cc5e2138fe5c08 SHA-1: 0a5df2ad0ae8a3a50359fb01cceb330f9082cc04 SHA-256: e987e64c971dcbcdbf9a9292cccbb830b17fd5b0fcf505ee5aeeeb185323c880
134 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external URIs, with one specifically linked to a search query for technical documentation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a phishing or malware distribution site. The presence of JavaScript suggests an attempt to exploit browser vulnerabilities or perform malicious actions within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://soxebez.ru/strik?utm_term=microelectronic+circuit+design+fifth+edition+solutions PDF link annotation
    • http://opensalon.xyz/editable_minnie_mouse_birthday_invitation_templatekteme.pdfIn PDF document text
    • http://ig-about.net/55236999813j3a3u.pdfIn PDF document text
    • https://cdn.sqhk.co/bokirebi/jHghMhM/easy_screen_recording_software_free.pdfIn PDF document text
    • https://cdn.sqhk.co/wifinalimow/ibNiegg/craigslist_seattle_pets_for_sale_by_owner.pdfIn PDF document text
    • http://artistichomesolutions.com/caracteristicas_del_sistema_politico_mexicano_de_1940_a_1988q4qv3.pdfIn PDF document text
    • http://es50off.pro/hornady_125_gr_fmj_300_blackout_load_datau7qnp.pdfIn PDF document text
    • https://cdn.sqhk.co/zulatobi/gjheaqi/digital_thermometer_cvs.pdfIn PDF document text
    • http://getsalon.xyz/web_browser_video_er_mace01h2.pdfIn PDF document text
    • https://cdn.sqhk.co/furigelo/jcjgidV/black_barocco_chain_reaction_sneakers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://nomamazuzut.atwebpages.com/numalosos.pdfIn PDF document text
    • http://gukewaxubi.epizy.com/24927515705.pdfIn PDF document text
    • https://e216d865-ddc7-438b-99b2-64609380b1bb.filesusr.com/ugd/7ae8b3_814d4f0f9ee64e19a90400a3c247926a.pdf?index=trueIn PDF document text
    • https://59bb578d-b312-442a-858b-1a1a54b18a6c.filesusr.com/ugd/c79b1c_1514171bfb7e4d518fafefa63ca2acb4.pdf?index=trueIn PDF document text
    • http://zavujosabojid.rf.gd/galaxy_buds_spec_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e151b36-dcfd-4e1d-82b7-4378019cc185/kurt_vonnegut_harrison_bergeron.pdfIn PDF document text
    • http://zukomakiduw.myartsonline.com/15561897097.pdfIn PDF document text
    • http://doxokalisawe.myartsonline.com/naze32_rev_5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5455b8e2-2239-4bb9-b85d-e8e425ffeddb/51757025385.pdfIn PDF document text
    • http://tinipukax.epizy.com/14425253569.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D4 4960 bytes
SHA-256: 4548a16b3f098adfeedfa90120f9d6ac4b71bc1dd417331d6ba1f9f7271e1f6d
font_01_sfnt_off000108ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108AB 12468 bytes
SHA-256: 0bedc35cbcf97f3dd6737d8605ef2eae569e3275b7c1a4a8f2cd29056b53cf00
font_02_sfnt_off00013266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13266 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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