Malicious PDF — malware analysis report

Static analysis result for SHA-256 d95c90ca9e0345a0…

MALICIOUS

PDF

90.0 KB Created: 2021-05-13 00:08:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7c727373b0e2cc8bcc8a0ffbef57e772 SHA-1: 11eae4a0fe06a4b27196808040377ce94c886939 SHA-256: d95c90ca9e0345a05ad153e76cd6aa6c44028261b176fef28a50fd6da56bc741
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 0.9951

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://mezovuduw.ru/strik?utm_term=samsung+tv+un32eh5000f+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4390643/normal_605307519cbe2.pdfIn PDF document text
    • http://kofodotig.sportsontheweb.net/99362269405.pdfIn PDF document text
    • http://limavirom.22web.org/autocad_training_for_interior_designers.pdfIn PDF document text
    • http://livethailand.fun/72649253817e3f2f.pdfIn PDF document text
    • http://foyou.store/calories_in_sonic_medium_popcorn_chicken0ap5a.pdfIn PDF document text
    • http://dalifajebuxog.scienceontheweb.net/disebinan.pdfIn PDF document text
    • http://mebovaduzi.mywebcommunity.org/how_to_use_sports_hd_dv_sq11_mini_dv_camera.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501980/normal_604a92b53f644.pdfIn PDF document text
    • http://lologunaw.mygamesonline.org/xobudozegodepupikeduz.pdfIn PDF document text
    • http://good-production17.site/mask_photo_editor_apkktmsx.pdfIn PDF document text
    • http://cozyplacefor.rest/batetipedosopemivo0a5cr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384640/normal_605f8c9d8132d.pdfIn PDF document text
    • http://sizegoduxuxa.mygamesonline.org/9696955497.pdfIn PDF document text
    • http://sewakasatixori.medianewsonline.com/managing_complex_change_matrix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371809/normal_606da728967d8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://6200e599-3f2f-4e3e-ab45-e6977ed7e777.filesusr.com/ugd/f8de3e_da330b7c86e94b248bc99cde7d8f8b19.pdf?index=trueIn PDF document text
    • https://4d75d3c9-3a4d-4df6-84ab-e48b83d723e5.filesusr.com/ugd/cdb50c_af0b6d3b58c645e68de40c63dca08374.pdf?index=trueIn PDF document text
    • http://sonowodiguvab.epizy.com/rorunafunuvupolomitax.pdfIn PDF document text
    • https://0fecb50d-c8db-4b5c-a67e-01a13b1c0e9a.filesusr.com/ugd/da7c2d_c08c1caf02da4e7397a23efddf7be795.pdf?index=trueIn PDF document text
    • http://futikuzita.onlinewebshop.net/peter_pan_picture_story_book.pdfIn PDF document text
    • http://rixibedi.onlinewebshop.net/add_subtract_fractions_with_like_denominators.pdfIn PDF document text
    • https://d190c387-1498-4382-a59e-98d1a0a9794c.filesusr.com/ugd/a91264_22ea2a7d1b68492b94f26135097a3738.pdf?index=trueIn PDF document text
    • http://wisalawisavu.epizy.com/adam_lambert_american_idol_queen_performance.pdfIn PDF document text
    • http://lesexuxu.rf.gd/actonel_150_bula.pdfIn PDF document text
    • http://relivoziz.atwebpages.com/axis_and_allies_europe_1940_second_edition_rulebook.pdfIn PDF document text
    • https://656adf98-7a81-40bd-8d0f-2b9c27d09201.filesusr.com/ugd/268ab1_71d1bc5fa9194c6dbf4e340e21fa0cd2.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000111c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111C3 5532 bytes
SHA-256: 8e1a527d67816de60aa102df81becff65e669603edab169cdf229aa10ff6af1b
font_01_sfnt_off00012470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12470 11120 bytes
SHA-256: fa0eb0c2ff0e0689d5c14bed9a0c9ce21fa22abe7e9cda83a536fdc631c9e63e
font_02_sfnt_off00014a64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A64 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176