Malicious PDF — malware analysis report

Static analysis result for SHA-256 07c01706064d3b73…

MALICIOUS

PDF

82.3 KB Created: 2021-03-31 18:31:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2379e444020bbb47ee19515a710b8647 SHA-1: 97c8ec4e75a59ac6a2d6eb27c77c9d596fadb9d8 SHA-256: 07c01706064d3b73fca5588ba045edbcaab175ff46b7ba18eddbe7e381f5b894
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://xajibur.ru/123?utm_term=boi+bella+vision+2020+audio PDF link annotation
    • https://cdn.sqhk.co/jijasitov/cihdhja/zasojegojukupu.pdfIn PDF document text
    • https://cdn.sqhk.co/tubadaluzafu/6WiftfJ/word_relax_app_cash_out.pdfIn PDF document text
    • http://kawopewil.22web.org/mubejedisokumugenadel.pdfIn PDF document text
    • http://silkhfig.bid/25703567343enmyq.pdfIn PDF document text
    • http://ledimpress.biz/similes_in_the_crucible_act_17h9uw.pdfIn PDF document text
    • http://quickpapp.online/74695666729hlhfn.pdfIn PDF document text
    • http://togusavek.22web.org/hunger_games_ebook.pdfIn PDF document text
    • https://cdn.sqhk.co/sawijewabob/hjhijgD/panowilamubabena.pdfIn PDF document text
    • https://cdn.sqhk.co/zejejofe/fjcdghZ/pitbull_dog_puppies_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/dedizajo/fjejhja/color_wheel_spinner_craft.pdfIn PDF document text
    • http://kukikifo.iblogger.org/retefatidus.pdfIn PDF document text
    • http://wiwuwanulujero.iblogger.org/91794574971.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4381dc0-100f-45c2-b1e9-10b9af32d275/kenmore_electric_stove_stainless_steel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9276cdc9-3213-446d-99f8-6384f6939b92/bivofofezojesodujara.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e54fb6e6-7739-4d3b-9cab-c5733552f846/vigefozexotatejik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39c7fe35-8de7-454b-9fd6-9bdfb011ea72/how_to_file_ssa_1099_hr_block.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d97f14f-a075-4c34-b671-f3f83a8020c5/xezadatekuxofesulok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/710594b0-effd-438a-9c0e-ad8f013721f9/fusixipabiketodifo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5ac8835-2f8a-41f1-bb26-cccaf22176ef/bowugagokodokam.pdfIn PDF document text
    • http://vezexosewomex.epizy.com/25894498658.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ca62003-38d4-4b30-94f0-c11a539e03f2/colorados_cheapest_computer_repair.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/559af18d-f790-4ada-8d1d-20f2cb289703/39119931002.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fed792a8-89c8-40bf-a95d-28a97dac1f9b/is_auditory_processing_disorder_a_physical_disability.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38d91056-7dfc-454e-a6fc-93cf91914449/2012_dodge_avenger_alternator_replacement_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ade5ef4-585a-4601-858f-2bb22743af19/rawawo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08a84c09-35af-4cf5-baf3-29b2dcfc2419/48479373836.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_off0000fb3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3A 5248 bytes
SHA-256: a9cde4d3cdc314e204d89b36b3f59885765c0bde6b82461c59c95b6326db5ec7
font_01_sfnt_off00010d1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D1F 2184 bytes
SHA-256: eb5421023f6fc619bb7e0d3d1f4e00a2b68b826a748853b006ef289ef3c922db
font_02_sfnt_off00011703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11703 10428 bytes
SHA-256: 4247decd752d69cd8c5463403e180adc36d4de3ea54a1f4125b68e751b0e6da0