Malicious PDF — malware analysis report

Static analysis result for SHA-256 a90f1b3bf95b0583…

MALICIOUS

PDF

85.3 KB Created: 2021-03-29 21:26:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 9f940fd3f1244c06de62a55c1f89b0a9 SHA-1: 1897377ebda7bd0f84e5fb86844e4ab6340ede90 SHA-256: a90f1b3bf95b0583cfca0786ee6aa9081a273fb13ddcc41342aefaabaf79ee9b
186 Risk Score

Malware Insights

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

The PDF file contains a lure related to a 'bluetooth speaker manual' and embeds a URL pointing to 'lozipotod.ru'. Heuristics indicate a link farm and ClamAV detected it as 'Pdf.Phishing.Trojan'. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://lozipotod.ru/wix?keyword=isound+sonic+waves+bluetooth+speaker+manual PDF link annotation
    • http://bonmarket.site/how_much_oil_for_2013_bmw_328irz61f.pdfIn PDF document text
    • https://parafobosa.weebly.com/uploads/1/3/1/8/131857791/34405600.pdfIn PDF document text
    • https://kevefizi.weebly.com/uploads/1/3/1/8/131871405/f5223e3.pdfIn PDF document text
    • http://xbet1.fun/blue_eyed_white_netherland_dwarf_rabbit_for_sale4055z.pdfIn PDF document text
    • https://numeroluxovuz.weebly.com/uploads/1/3/4/7/134733954/gapibo.pdfIn PDF document text
    • https://belumikifisa.weebly.com/uploads/1/3/4/6/134666155/9954360.pdfIn PDF document text
    • https://xovobinawulum.weebly.com/uploads/1/3/4/8/134883327/1098644.pdfIn PDF document text
    • http://bitsracing.net/electronic_battleship_advanced_mission_instructionsx8b52.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/0994a706-df91-497c-abf6-84e338048846/what_is_ap_human_geography.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/26085711304.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7920263f-ce96-49bd-bd57-86f536a3288e/76154961802.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2a3ba0e-8337-4c4d-aa34-fe44f29f21e6/toyota_highlander_hybrid_tow_package.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bf07dc2-9bea-4e05-a668-b32b41d9119f/687150086.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/directv_now_beta_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d559dc35-7624-4531-b767-18ec4fe971fa/dark_days_at_the_magna_carta_release_date.pdfIn PDF document text
    • https://s3.amazonaws.com/bagokiko/haloalkanes_haloarenes_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/what_are_the_five_parts_of_a_tree.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73ef1e6b-4bd2-45a4-8e11-b0384606f6bd/50_shades_of_grey_contract_rules_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24df9df8-9a2c-4414-a382-82f6ef219f4a/xevanigofuka.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/book_review_of_twenty_thousand_leagues_under_the_sea.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/skyrim_sheet_music_trombone_solo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32a8cdc0-69d2-40b3-97a1-6d183bcc06f7/samsung_xpress_m2835dw_printer_problems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dfaa375-14dd-4b01-a7de-8cbec2fcbf69/xoniwulelom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a188a0e6-7229-414f-9910-58f218204a92/what_does_an_it_system_engineer_do.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_off00010104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10104 5488 bytes
SHA-256: 7c16d6c9cf240f57f531f74c381122757ac20b03cdb424f757324fd8f4471b05
font_01_sfnt_off00011386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11386 10972 bytes
SHA-256: 388d388e7289f0195a65d7d24cf21c5b6c31b529da15fe4fad94e9a3b29ecb12
font_02_sfnt_off000138ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138EA 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34