Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e76e5002bca1112…

MALICIOUS

PDF

89.1 KB Created: 2021-06-10 16:17:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b667c5f11bba71878abd31fd90d9b056 SHA-1: c6ec885670680e9374c45663a4326fa6bddc11e0 SHA-256: 0e76e5002bca1112faf1f487aed47bea37daba2833a77284ae50258e6479a56a
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 0.9992

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://oniceh.ru/pbw?utm_term=ami+subhash+bolchi+720p+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383689/normal_600f5a704749c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481072/normal_5ff8ab4dde015.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423714/normal_605d9c7d96c3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413563/normal_603d384d47aa9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482216/normal_5fc5b33a75e60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503050/normal_600f87973b0ae.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://wikifuvuz.pbworks.com/f/rikesuwikuwo.pdfIn PDF document text
    • http://midevodimu.pbworks.com/f/livro_casos_clinicos_fisioterapia.pdfIn PDF document text
    • http://sejiliki.pbworks.com/f/64854042191.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a2a8f6f-1ce5-4d32-a6f5-1a972e6adc0a/sepipagafedumal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1529aade-29e8-41b3-bf88-a4f475e562db/41090281489.pdfIn PDF document text
    • http://lururefisu.pbworks.com/f/bikupebivodu.pdfIn PDF document text
    • http://wekibivu.pbworks.com/w/file/fetch/144628941/why_is_kitchen_cleanliness_important.pdfIn PDF document text
    • http://zizovitunex.pbworks.com/w/file/fetch/144483423/kalnirnay_2021_marathi_calendar_march.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bcc3162-34f3-428e-852d-03cfaf941794/honda_shadow_1100_carb_rebuild_kit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/184cdf55-0c63-4ffa-807f-b104cf13f5c0/97622263803.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74f72b43-04fc-4f8f-888b-7c37ac73901a/how_to_turn_off_braun_thermoscan.pdfIn PDF document text
    • http://padimagofo.pbworks.com/f/passive_with_modals_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8e7f8fc-7fe8-432e-81ed-7129f33b7b53/bujadupasaneforujamopir.pdfIn PDF document text
    • http://vogituvu.pbworks.com/f/hum_mar_jayenge_mp3_song_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36afa4e4-7508-4912-9c4c-9b1b0f932a1a/cuisinart_14_cup_food_processor_parts.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f881.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF881 5792 bytes
SHA-256: 9933e6678d130f4f510b40bbfa92ccdc6a4bfe85c18b2467ee9d682f0bc6a243
font_01_sfnt_off00010c29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C29 10880 bytes
SHA-256: ab9fa3fb1988852db227c9b4cb93522f9ae756d78fc9e0974c87025c20889c92
font_02_sfnt_off00013186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13186 16192 bytes
SHA-256: 4682b72f2afa33b20cf875d84024ffdd6778cb348d5560ed491e7fe37e149525
font_03_sfnt_off000146d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146D0 3472 bytes
SHA-256: 2229cf1156e4a259d4f50474697a5d5828fe5f21b67e2b3346cd185296fc0763