Malicious PDF — malware analysis report

Static analysis result for SHA-256 62329757cbf471f0…

MALICIOUS

PDF

75.2 KB Created: 2021-03-04 13:57:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 21f9ad9af36d6c532883244e1af503c4 SHA-1: b3c14e97f6313baf3faf0acae2bc2e5e20dae266 SHA-256: 62329757cbf471f09496e358e2df4c640e9267897c2209e9526a30a461871291
186 Risk Score

Malware Insights

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

The PDF file contains a link farm designed to redirect users to various external sites, one of which is a potential phishing or malware distribution URL. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to contain keywords related to product names, suggesting a lure for a scam or phishing attempt.

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 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://druttle.ru/strik?utm_term=logitech+harmony+elite+remote+control+%2526+smart+hub PDF link annotation
    • https://cdn.sqhk.co/fekolisuzub/sidl9kT/photo_editor_blur_background_app_for_pc_download.pdfIn PDF document text
    • https://giretalude.weebly.com/uploads/1/3/4/6/134677333/7843878.pdfIn PDF document text
    • https://cdn.sqhk.co/disumuneriva/cfjgieb/vanagon_speedometer_cable_replacement.pdfIn PDF document text
    • http://disozire.mygamesonline.org/how_can_i_get_six_sigma_certification.pdfIn PDF document text
    • https://cdn.sqhk.co/pawosuku/YeC9L9f/motion_graphic_designer_salary_in_us.pdfIn PDF document text
    • https://cdn.sqhk.co/zaliroded/ecidXBX/word_connect_answers_level_338.pdfIn PDF document text
    • https://cdn.sqhk.co/zimidenex/jjhxA8S/rush_limbaugh_show_youtube_10_8_19.pdfIn PDF document text
    • https://cdn.sqhk.co/nalujujoso/Hihohds/pokemon_go_can_t_see_friends_tab.pdfIn PDF document text
    • https://vogoworelo.weebly.com/uploads/1/3/4/2/134266182/1808238.pdfIn PDF document text
    • http://zesenadozefut.sportsontheweb.net/how_many_quarts_is_a_power_pressure_cooker_xl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5090c2af-253d-40c3-bfb7-942fc6db26b0.filesusr.com/ugd/0511f5_e531a8925ab94464b5ff64e9e38ec99f.pdf?index=trueIn PDF document text
    • https://8909b315-4d59-4940-aabf-0fdaa532e0ad.filesusr.com/ugd/4542d9_44a2690254b24ff48d2736d5c58feda8.pdf?index=trueIn PDF document text
    • https://b7af6bb9-01eb-4839-ab56-764651de4344.filesusr.com/ugd/2486b5_3de2caf54b7045bb9b97166635e69157.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2053cc3e-88bc-4c1f-ad08-ec465487fd52/76425358715.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b76b2b3b-fec4-4e20-b3aa-31fc422d1c69/how_to_get_mp3_on_iphone_11_pro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dbba732-abbe-404e-bffa-764795935bfe/kenwood_kdc-bt362u_reset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1430a177-1783-4d35-b15a-e25a96ab75bc/nafenop.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_off0000e99e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE99E 5080 bytes
SHA-256: 6bbc0fbc4275aa23e2308cbd237645f6a0e21708122d007f5ba5800bd683aa74
font_01_sfnt_off0000fad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD0 10832 bytes
SHA-256: 5132d0c45da5f5727b81dec0af48f5a72d5e8664de9924679a122379918456ad

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