Malicious PDF — malware analysis report

Static analysis result for SHA-256 e83738963aac10d8…

MALICIOUS

PDF

70.8 KB Created: 2021-06-07 10:20:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9ee8a35ab6b33e1b251d366f1fbeb651 SHA-1: ca519e3272cb3e01a0dc52a936bcdcc05ec53d95 SHA-256: e83738963aac10d8f1bab72de96bb1a4e5372188ea5d04fee9791d715def653e
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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://coretry.ru/pbw?utm_term=hitman+agent+47+movie+download+filmywap PDF link annotation
    • https://vususutuf.weebly.com/uploads/1/3/4/6/134634118/zozijibizer.pdfIn PDF document text
    • https://falababipudin.weebly.com/uploads/1/3/4/8/134847750/xufetixupijupipeju.pdfIn PDF document text
    • https://nivumumati.weebly.com/uploads/1/3/4/7/134703955/d5709a8118.pdfIn PDF document text
    • https://gujuxufun.weebly.com/uploads/1/3/5/3/135398829/5638013.pdfIn PDF document text
    • https://rakomuditopag.weebly.com/uploads/1/3/4/7/134717505/89f8200786.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jajafad.pbworks.com/w/file/fetch/144419160/is_there_school_tomorrow_on_presidents_day.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc8b425b-7b5f-4f8f-ba06-08a6809e79b3/58141058036.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1686cea4-e608-4c5e-86a9-75b8e2261d67/rockwell_versacut_owners_manual.pdfIn PDF document text
    • http://natetusiwuwo.pbworks.com/f/90668814562.pdfIn PDF document text
    • http://dekokos.pbworks.com/f/13610793161.pdfIn PDF document text
    • http://jubujefaj.pbworks.com/w/file/fetch/144626472/cartoon_cat_mod_minecraft_descargar.pdfIn PDF document text
    • http://biduzoku.pbworks.com/w/file/fetch/144614154/medical_ethics_multiple_choice_questions_and_answers.pdfIn PDF document text
    • http://wepadigisita.pbworks.com/f/where_to_put_cheat_db_on_ppsspp_android.pdfIn PDF document text
    • http://bawamotijeku.pbworks.com/w/file/fetch/144573309/zixojegipitirajosivibo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71b0dcd2-e0e6-45f6-9bb6-c2a6506c578c/37414199865.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36308d2c-c1d5-49f3-8095-9cff9823f8ae/reading_comprehension_test_grade_8.pdfIn PDF document text
    • http://xobapotowi.pbworks.com/f/ingenuity_baby_swing_max_weight.pdfIn PDF document text
    • http://mefijunov.pbworks.com/f/can_i_pet_that_dog_video_moonpie.pdfIn PDF document text
    • http://kunixove.pbworks.com/f/what_is_the_poem_fog_about.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_off0000d84f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD84F 5472 bytes
SHA-256: 39b32ac5fcedd8d5d4140430e970bfffefda66500a4f2bcb2ce309bf2b21f025
font_01_sfnt_off0000eb08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB08 10244 bytes
SHA-256: 290528f0bcf679566be13b58f226501db0bf2931e834357dcbab231dc27cdf37

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