Malicious PDF — malware analysis report

Static analysis result for SHA-256 d19f59175188fe0f…

MALICIOUS

PDF

78.4 KB Created: 2021-04-02 02:55:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d3a61bee745d7fa469d4471fa8d60afe SHA-1: df0be7e4df30aeb653c8261406fb2a084ef884f9 SHA-256: d19f59175188fe0ff0efed6077bb11537d831d88aa60695f6d41b821a7f113fc
186 Risk Score

Malware Insights

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

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 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://dafemum.ru/aws?utm_term=download+autocad+for+mac+2020 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4412887/normal_5fcff4fd6b990.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482399/normal_5fdb272e60bb3.pdfIn PDF document text
    • http://wepijafiguwenan.mywebcommunity.org/74853951252.pdfIn PDF document text
    • http://rubolanir.mypressonline.com/39660482945.pdfIn PDF document text
    • http://wegoradubi.sportsontheweb.net/58371322818.pdfIn PDF document text
    • http://nekuwagibajese.getenjoyment.net/does_gamestop_sell_nintendo_ds_chargers.pdfIn PDF document text
    • http://tavegumata.sportsontheweb.net/life_in_the_spirit_study_bible_kjv.pdfIn PDF document text
    • https://xadixifiv.weebly.com/uploads/1/3/4/8/134888816/bojetox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495837/normal_60354d7866188.pdfIn PDF document text
    • https://sopulekazixov.weebly.com/uploads/1/3/0/7/130776801/8039233.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391642/normal_600968432f04a.pdfIn PDF document text
    • http://guronid.mygamesonline.org/manual_de_auditoria_de_sistemas_informaticos.pdfIn PDF document text
    • https://nupepapuk.weebly.com/uploads/1/3/1/4/131484133/376ad1298.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425533/normal_6057fcb05df19.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kipejefanowisu.atwebpages.com/gm_diet_day_1_indian_recipes.pdfIn PDF document text
    • https://48e5b1ff-25fb-49a4-826b-3ad3f3a15688.filesusr.com/ugd/0d632a_8fe148e54dbe4fab949e44f00a325d23.pdf?index=trueIn PDF document text
    • https://981168d4-05fc-44b6-871d-73371d7e8cf1.filesusr.com/ugd/87d215_1e899ba44206450eb8c74d3326864ff7.pdf?index=trueIn PDF document text
    • https://c18d9829-3add-4afa-bc87-35007fe3998a.filesusr.com/ugd/70c1ec_e0d5df59a0ee4e708607d5524b9a3a3a.pdf?index=trueIn PDF document text
    • https://1527c8d3-3321-4e9f-872f-e2bebb57bac2.filesusr.com/ugd/bf2d42_1fb54cb0dd5441afb87e47ff9e68e41d.pdf?index=trueIn PDF document text
    • http://reladefuxuna.onlinewebshop.net/50768207009.pdfIn PDF document text
    • https://e0ff2378-281a-4ea3-95ae-419c526fdc99.filesusr.com/ugd/0baf77_3ccfb50d5f654b828a4f11dd64edacff.pdf?index=trueIn PDF document text
    • https://1618b3f4-dcc0-4047-a816-eeb1cbe43c51.filesusr.com/ugd/a01749_20d93ce484cd4ec7abc4a7fa08cb8c24.pdf?index=trueIn PDF document text
    • http://lijowavatajo.myartsonline.com/keurig_2.0_uses_what_kind_of_cups.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e67a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE67A 5356 bytes
SHA-256: 506c639973eb239c540c7070db461d278dde43f081368fd61f7cd0bb6ea3247e
font_01_sfnt_off0000f8b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B6 22128 bytes
SHA-256: 7ee95137d9279203166356ddf4082ed6f322cc6750c4f881871ae6e194d74eac