Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdaf3b7a3af98f6c…

MALICIOUS

PDF

94.2 KB Created: 2021-03-29 21:27:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 31c4b6666dad8e1ef623858140dc5933 SHA-1: 88430daf0cbed736fc33ad6e49f24f29be5c9361 SHA-256: bdaf3b7a3af98f6c8c8705d4fc66f68dffe907e5be191f2fe5f274329b930ba1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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://druttle.ru/wix?keyword=mabry+property+management+atlanta+ga PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369508/normal_5ff5564733ed3.pdfIn PDF document text
    • http://vopagokiniki.mypressonline.com/anticoagulantes_orales_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/pegebatanuz/jghebbd/action_bar_settings_android.pdfIn PDF document text
    • https://cdn.sqhk.co/moviferu/gj67mif/92145039173.pdfIn PDF document text
    • http://namafafiteg.mypressonline.com/22199242618.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417305/normal_5fe0d053e32d3.pdfIn PDF document text
    • http://mimivamefigupe.sportsontheweb.net/97419722108.pdfIn PDF document text
    • https://cdn.sqhk.co/senuziker/jgF63Gk/visit_a_city_boston_itinerary.pdfIn PDF document text
    • https://cdn.sqhk.co/budajawisore/sHiijal/switch_controller_drift_lawsuit.pdfIn PDF document text
    • https://cdn.sqhk.co/wugolekufo/fHjeicX/58605194861.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427828/normal_5fc79d08d7dde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386852/normal_5fd7cd674037f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459478/normal_6004d40021c3f.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/b64b02f2-630e-42cb-83cf-084da35d142b/lupazu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91991202-0321-4d37-a880-6dd0a465ecb0/98958254462.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55e1a7d3-3814-460c-808f-9045298347ef/80124865846.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f5b0e70-6ddd-4203-9f69-52b6d5496fe9/who_is_no_1_on_spotify_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9670ad7b-e6b6-4bca-96bd-0ca159c64983/pibesewiso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa74e73a-5169-44b3-9daf-a476d7134ccd/82863484896.pdfIn PDF document text
    • http://xuxerutiwuv.onlinewebshop.net/gastrointestinal_tract_mcq.pdfIn PDF document text
    • http://bemabam.myartsonline.com/problem_based_learning_in_nursing_education.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/665a6759-cc0b-4375-adf2-71ebad1e30b7/vocabulary_workshop_level_b_unit_7_choosing_the_right_word.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_off00012fbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FBF 5208 bytes
SHA-256: b73c8441ad8577db52be62c30c4ca1db4817cfe07e5fae45ff2d35bc69c388c7
font_01_sfnt_off00014174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14174 11976 bytes
SHA-256: 590ebe9b421f785495fa092cd492782b284041f08d8976d1ecb8fa7a5d59ced9

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