Malicious PDF — malware analysis report

Static analysis result for SHA-256 78ef11e02b30649d…

MALICIOUS

PDF

84.1 KB Created: 2021-03-09 01:49:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 845b1def1bd4d6fa746c22740dcf3147 SHA-1: 7397bebd782ab76b0e21c138b9d263927e51a2e5 SHA-256: 78ef11e02b30649da9e04a694cb609a163a20b4d001c0371b515c9fb388590b0
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a significant portion pointing to disposable hosting and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/strik?utm_term=what+are+algorithmic+trading+strategies PDF link annotation
    • https://cdn.sqhk.co/rowazazapa/knicc98/43375052764.pdfIn PDF document text
    • http://nowukusox.mypressonline.com/the_bfg_movie_trailer_2016.pdfIn PDF document text
    • http://xitodefigatefuj.medianewsonline.com/megovipojazonuro.pdfIn PDF document text
    • http://xufamorazogubov.sportsontheweb.net/24812047615.pdfIn PDF document text
    • http://faripofijukevom.mywebcommunity.org/jawawolorupoxotojevu.pdfIn PDF document text
    • https://wuzakadebetes.weebly.com/uploads/1/3/0/8/130814976/tejaj.pdfIn PDF document text
    • https://gatimosuxanad.weebly.com/uploads/1/3/2/8/132814295/bamidagep.pdfIn PDF document text
    • https://cdn.sqhk.co/dinigivo/cpvqbI5/the_new_york_times_crossword_seattle.pdfIn PDF document text
    • https://sanajupa.weebly.com/uploads/1/3/1/4/131406847/kakuvenojisuz_wamelebexedera_samagebikufi.pdfIn PDF document text
    • https://nemaxololele.weebly.com/uploads/1/3/5/3/135304154/joxepuforuxupa.pdfIn PDF document text
    • http://nejevefivi.mypressonline.com/run_for_your_life_midtown_charlotte.pdfIn PDF document text
    • https://dosisusibifoba.weebly.com/uploads/1/3/4/2/134236234/jiranurafabosem.pdfIn PDF document text
    • http://xawamiwupajev.mygamesonline.org/garmin_541s_user_manual.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
    • https://uploads.strikinglycdn.com/files/d4bc4976-fe63-4988-b8d6-9b4cebc0ecfa/75255699336.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8e5d039-6927-4c05-bffc-5eeb63dc784c/rhetorical_devices_in_i_have_a_dream_prezi.pdfIn PDF document text
    • http://naxesabefadufu.atwebpages.com/integrated_chinese_level_1_part_2_workbook_answer_key_lesson_16.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/interim_reporting_requirements.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/winrar_2019_crackeado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b7f010f-2d40-4b8a-9832-6775fa57de09/berixumomezog.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/free_beetalk_latest_version.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/88729493925.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d5c033e-b75e-4360-a02f-3909c83d36b8/wezibimezamizoradowumi.pdfIn PDF document text
    • http://jokosen.atwebpages.com/61753068218.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/donut_birthday_invite_template.pdfIn PDF document text
    • http://japinoxizidunub.myartsonline.com/28238878832.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5314206-c7ed-4390-ac67-5c96b3474671/43120604315.pdfIn PDF document text
    • http://magegefopo.atwebpages.com/how_to_crochet_a_flat_circle_left_handed.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_off0000fd3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3F 5152 bytes
SHA-256: 0df0f85e6f32e6523ab7e6863570add37191a8433df937aec9130b787a99e93f
font_01_sfnt_off00010e9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E9F 11116 bytes
SHA-256: b48ce4c5fab13adf9317ce7d0a3a7f171c4fc602b63bb729ebdefc480c53521a
font_02_sfnt_off0001346c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1346C 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3