Malicious PDF — malware analysis report

Static analysis result for SHA-256 38bb48a94bb5ec9b…

MALICIOUS

PDF

74.0 KB Created: 2021-03-07 05:58:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: f6704a0265292bf98fb3cad873cc5ece SHA-1: 7102f07069c8f138232d5818b92bec808738a3f6 SHA-256: 38bb48a94bb5ec9b4a52f7a9caf084d08a0494cd2d514b7dce930518e6b49aca
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs and is flagged by ClamAV as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high volume of links to potentially malicious or disposable domains, suggesting an attempt to redirect users to malicious content. The ML classifier also strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • 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.
  • 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/strik?utm_term=race+class+and+gender+in+the+united+states+11th+edition+used PDF link annotation
    • https://cdn.sqhk.co/wukibezoso/gfIifjf/94045968486.pdfIn PDF document text
    • https://cdn.sqhk.co/gusisitixinu/fgjjjhf/dragon_city_heroic_race_breeding_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/xasakeza/jg7Cafc/best_strawberry_ice_cream_cake_recipe.pdfIn PDF document text
    • https://sasifebuwanozag.weebly.com/uploads/1/3/4/2/134234849/4454918.pdfIn PDF document text
    • http://bestgirl69.com/grooming_services_visual_basicmak03.pdfIn PDF document text
    • https://vigelabed.weebly.com/uploads/1/3/4/3/134368569/pepesidarawa.pdfIn PDF document text
    • http://adminhalil.com/public_administration_careers_and_salaries_in_indiae0z71.pdfIn PDF document text
    • http://kakadari.iblogger.org/cuantas_tazas_son_150_gramos_de_azucar_glass.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirorig/EhcQiei/pogapijobelipirejidazaxuk.pdfIn PDF document text
    • https://cdn.sqhk.co/fomiroza/eggQAjc/monster_world_fire_gba_rom.pdfIn PDF document text
    • https://tutemedoz.weebly.com/uploads/1/3/2/8/132814241/4435759.pdfIn PDF document text
    • https://bexaxaxaf.weebly.com/uploads/1/3/2/6/132682125/zagatam_mibajanavaguxok.pdfIn PDF document text
    • http://topstop.site/10958715933lc6ys.pdfIn PDF document text
    • https://xoxefalumigak.weebly.com/uploads/1/3/4/5/134527234/4915678.pdfIn PDF document text
    • http://muzoc.xyz/panasonic_dmr-ez48v_specs5tpr9.pdfIn PDF document text
    • http://vonokumi.iblogger.org/metric_unit_conversion_and_scientific_notation_worksheet_answers.pdfIn PDF document text
    • https://lepomanorep.weebly.com/uploads/1/3/4/8/134856804/bopejume.pdfIn PDF document text
    • https://vejelajaluseno.weebly.com/uploads/1/3/5/3/135392022/6100441.pdfIn PDF document text
    • http://wiinorama.fun/ramapatimuvexirefimijoz5jjee.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pufaperimixalet.epizy.com/video_er_professional_opera_mini.pdfIn PDF document text
    • http://pebabivesada.epizy.com/neil_degrasse_tyson_brother_art.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/067a3dce-c736-46cf-8b1b-a750bd1475fe/whos_afraid_of_virginia_woolf_movie_trailer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a0ba1e4-441b-45f9-b754-576c096e6a98/12875765398.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eabcd9b7-dda0-4cd8-abd8-09d0efc26535/16798282785.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01c2ec46-d2a2-43a2-b055-ede77df07b9e/96223188394.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF0 5260 bytes
SHA-256: 0f77c9c2fbacd293d3ce5abdc51850d9e7670a001a4750427eb613004de2655f
font_01_sfnt_off0000e1cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1CF 10172 bytes
SHA-256: e06e8c66e5ab7ac1b5cdc92da235b4a7f513c4d87c8a26f896d058ec523d4697
font_02_sfnt_off000104f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F3 16084 bytes
SHA-256: 6793135c9d5f2d9402216549edf66541f87ac1c2d7f717693568b2625ec966b3