Malicious PDF — malware analysis report

Static analysis result for SHA-256 daf4e01210fb6d7e…

MALICIOUS

PDF

100.4 KB Created: 2021-04-08 06:57:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 99e035cd45a3696d7277fc27e22d0067 SHA-1: df17532248694905b6d419386c2130af4eb8f61b SHA-256: daf4e01210fb6d7e42a625dc8e48c31a9891a8a41b5676a3cf6f6204e3991b05
126 Risk Score

Malware Insights

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

The PDF contains an embedded URL that points to a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

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://midufefew.ru/wix?keyword=turnigy+trackstar+120a+turbo+manual+for+sale PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4390330/normal_60676bde2b9c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383703/normal_5feba3c18a95c.pdfIn PDF document text
    • http://sejerodetupumil.medianewsonline.com/academic_text_example_article.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448103/normal_5ff2bd608196a.pdfIn PDF document text
    • http://meetsol.xyz/dictionary_english_spanish_translation_free_downloadg249u.pdfIn PDF document text
    • http://heleogose.online/28_italian_songs_and_ariasb1w35.pdfIn PDF document text
    • http://zomosidotewe.sportsontheweb.net/articles_rules_esl.pdfIn PDF document text
    • http://2022god.com/geronimo_stilton_kingdom_of_fantasy_full_movie_in_english11ylo.pdfIn PDF document text
    • http://wonozudobitisog.scienceontheweb.net/sozumejavepamabipewel.pdfIn PDF document text
    • http://bafiselavanebep.mywebcommunity.org/esophageal_cancer_treatment.pdfIn PDF document text
    • http://tijudozi.scienceontheweb.net/dugafesuzudal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455403/normal_606211a030520.pdfIn PDF document text
    • http://mizizufiku.mywebcommunity.org/nofubenuru.pdfIn PDF document text
    • http://esclick.pro/how_to_join_wood_together_without_nailsa0wdl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471273/normal_5fe4f177eafbc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380082/normal_606a03ca5df10.pdfIn PDF document text
    • http://www.opentle.orgIn 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/519a5eb3-5780-41a6-a73e-da921895f2d1/zazixaleku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e97bc179-be70-4086-b2bf-5f5a451c11a3/how_to_get_unlimited_money_in_simcity_buildit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a95b8f0-e843-44fd-9cba-828386119c93/tajweed_for_beginners_book.pdfIn PDF document text
    • http://romapubimowa.onlinewebshop.net/speaking_english_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ea39994-6e6e-464d-a77b-5d73d4b9f5e5/all_american_boys_summary.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://www.gnu.org/licenses/gpl.htmlIn 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
stream_003_off00012702.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12702 10392 bytes
SHA-256: f5fef4cc6eac6301330dcff2beae62386a9e0ce917c24dfb0a803088e6a06f49
font_00_sfnt_off0001135c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1135C 5784 bytes
SHA-256: e06129c157ed6f5f44ec79a197556bb5185695b1c4cb72df35fa15417bae8421
font_02_sfnt_off00014469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14469 12384 bytes
SHA-256: 5b1d63973332cad720e7530056de2f26208c8232974c0c56b97fac6812e45c2e
font_03_sfnt_off00016e76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E76 16120 bytes
SHA-256: acd535f3e908b1f60b27db0692cd17477bdb5ac724d8846cec3f628bd6278784