Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b330431c7e6da19…

MALICIOUS

PDF

81.5 KB Created: 2021-03-04 13:54:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: d787e09aeb01e68046a1b7c718c629c3 SHA-1: 9905c7dce0cf3e5fd9ef38bb1d10ff51dedb7630 SHA-256: 1b330431c7e6da19c9fa70aab8f181cabcef9b7cef1e124354d5331caa2e3b21
126 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is part of a link farm on disposable hosting, further suggesting malicious intent. The ML classifier and ClamAV detection strongly indicate this PDF is malicious, likely a phishing lure.

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://dugedepap.ru/award?keyword=nancy+drew+season+1+episode+12 PDF link annotation
    • https://cdn.sqhk.co/buvaboda/gdgjnDI/basketball_battle_apk_day.pdfIn PDF document text
    • http://xebasebidigu.iblogger.org/conan_doyle_biography_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/dodagirojep/KhcOCid/82521989201.pdfIn PDF document text
    • http://xifadezuzurap.medianewsonline.com/40801830226.pdfIn PDF document text
    • https://cdn.sqhk.co/werutojij/ibgievB/friend_locator_app_for_iphone_and_android.pdfIn PDF document text
    • https://cdn.sqhk.co/metajewamiva/AKchjxc/game_maker_3d_pc.pdfIn PDF document text
    • http://pupezawat.scienceontheweb.net/is_wendy_healthy.pdfIn PDF document text
    • https://cdn.sqhk.co/potasuregoz/jbje7gh/steppy_pants_apk_mod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3c8197b3-f999-4f29-b3da-fbdfea3dbf34.filesusr.com/ugd/0047a4_f0dd44e498a14c6ea74af2903986e49c.pdf?index=trueIn PDF document text
    • http://varoniwarovez.rf.gd/zonuzuwal.pdfIn PDF document text
    • https://af30af13-e0b7-4de0-aca7-7783c01eade2.filesusr.com/ugd/9757e7_e2d320c9f17e4a718db774a44d405d79.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/da2b9255-ca4d-4e06-b81e-13fcd63bf3ca/harga_tv_led_panasonic_viera_42_inch_bekas.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/798508023.pdfIn PDF document text
    • https://4328a374-8b5c-4134-9cef-e132ca5fc89d.filesusr.com/ugd/6732b1_44d5bf3c01b3419c83f7093070ea3237.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1a401e5-35d3-4047-9a84-3333a1a67600/15081577993.pdfIn PDF document text
    • https://3437305d-a3f4-4f94-9a63-846dd410f5be.filesusr.com/ugd/ffe76b_1ed558ca912a4a8f92315e96c3bc6c67.pdf?index=trueIn PDF document text
    • http://nujisebiko.epizy.com/29258116231.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/78495877560.pdfIn PDF document text
    • http://nepanazunisemi.epizy.com/sakhi_movie_mangalyam_song_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6b45c63-81e9-45e8-85fb-12ae970d67a7/kefuzekimaje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bb6b8e5-2088-4188-b4d1-bb89f0b57470/how_can_i_heal_my_life.pdfIn PDF document text
    • http://ninamutarat.epizy.com/99456090502.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_off00010075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10075 5384 bytes
SHA-256: 147e510e133d1166613f48624469f36016dc14435c685c57837357f0d3eec7d5
font_01_sfnt_off000112f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F8 10984 bytes
SHA-256: 2006b385dc55172370ec9e0e6c95af3f65a5fb9f39467f2bc54ef69f93700d27

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