Malicious PDF — malware analysis report

Static analysis result for SHA-256 b202022ba2796bbd…

MALICIOUS

PDF

98.8 KB Created: 2021-04-01 12:39:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5e9069efcd0e4012154fc1d0452aa5d7 SHA-1: b27097f5ab1717195602bc0a1c1263f8e37e1c5d SHA-256: b202022ba2796bbd302d714553192ae7d2a0f2b92a8a7f4a42ffa929a3b5d84c
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 0.9995

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://xezojetit.ru/wix?keyword=jobsite+or+job+site PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4499021/normal_5fdab19b36e80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473938/normal_5fdbf96e19801.pdfIn PDF document text
    • http://1offpark.xyz/roule_galette_petite_sections7sbv.pdfIn PDF document text
    • http://huseyincanx.com/zebopvedeo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490949/normal_5fdf1c6edcc32.pdfIn PDF document text
    • http://natnat.fun/178684554772kast.pdfIn PDF document text
    • http://lnstagaram-verifiedbadges-from.com/areas_de_recursos_humanos_y_sus_funcionessp83g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461495/normal_605305eaad085.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482882/normal_5fc5be76b4f34.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/4c55fdfa-9f93-48a7-a38d-ed6a4c2d50e4/gunezijopefodesebuke.pdfIn PDF document text
    • https://c3373aeb-ed74-4f2d-b631-fa679e0a3f6f.filesusr.com/ugd/cbe7f7_ba27a8f10fe5481e97f63b12e67a7119.pdf?index=trueIn PDF document text
    • https://cb8582fb-ab29-4f13-bfd4-623ca244ab52.filesusr.com/ugd/d61b30_4097dd8401b74eefb9efe60b5b0bacff.pdf?index=trueIn PDF document text
    • https://39c1d623-eccb-4af0-a86a-15328a2d61f9.filesusr.com/ugd/3cb6cb_e4fb6f16687540bead4331589b9bb9d9.pdf?index=trueIn PDF document text
    • https://3d7c42e8-cad9-4196-8f3c-0f210fd97588.filesusr.com/ugd/1b7c00_8ed1ccc0d1a14d51822356531ac71461.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3e055b0-c467-4937-a29b-05b40bad7e19/que_es_la_pereza_mental.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a22882a7-ae07-44ed-91fd-973b70467f75/11243523532.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23ce2d57-10c7-4d43-8e83-58c7e45a2c8b/limowuzazijupebijow.pdfIn PDF document text
    • https://cad90261-f038-4e8a-b384-2e0e37e6cb8c.filesusr.com/ugd/4c4e45_d4b3271fbb9c4dc7b0d4ce8a0f1a5f80.pdf?index=trueIn PDF document text
    • https://aa6d2f86-95e2-42cc-897e-6bbd71c3a116.filesusr.com/ugd/78daac_dd8549bf0c1947a281c65ad7961bc932.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a858ebf3-4767-46bd-a62a-8d14aed653b6/diario_de_greg_un_viaje_de_locos_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9de8e331-5097-4d81-b181-da214913f0e6/britax_car_seat_protector_target.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c29bf52-7513-4cfd-9e62-9eaee0267ac9/litivoba.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_off000133b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133B4 4644 bytes
SHA-256: bbbfffb790c84f351556191c02724dcce379a12d9599e48e3584772c429f13b1
font_01_sfnt_off0001438e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1438E 11068 bytes
SHA-256: aabf3c0a2a7ee18d3765696431c8634f75f427ec5008e3ab049fa4f5d2aac8df
font_02_sfnt_off00016967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16967 16036 bytes
SHA-256: 52db30b66cfb76898988bc7c6ed152514c301740808ab95bec9c68e49df23550