Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d763177e055bba3…

MALICIOUS

PDF

73.0 KB Created: 2021-06-13 15:39:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c8ee581365fc3d20271d4ef079e398c6 SHA-1: ca53fb3945009e84fb3962b4b9423b61a3a35887 SHA-256: 2d763177e055bba3d6197a13e28a1ad3cbaff2999ad1bcd00827ce8c1a245576
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one prominent URL suggesting a download for 'sql server 2008 full'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, and ClamAV detected the file as 'Pdf.Phishing.Trojan'. This suggests the file is part of a phishing campaign aiming to trick users into downloading malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://coretry.ru/pbw?utm_term=download+sql+server+2008+full PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490141/normal_600a1f7688817.pdfIn PDF document text
    • https://rikedinodewo.weebly.com/uploads/1/3/5/3/135323941/5a8b2c2b19f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445101/normal_5fda394e0441c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409826/normal_5fe4d07a1c513.pdfIn PDF document text
    • https://kusonanozeko.weebly.com/uploads/1/3/0/7/130775507/eb94c27b0a40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485809/normal_6026af5448780.pdfIn PDF document text
    • https://fizakilugoleji.weebly.com/uploads/1/3/1/4/131438405/61bddba9e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446273/normal_5fd9439c7f5ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466679/normal_60bb125e3ac2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462065/normal_600b399779959.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461202/normal_603f36eeac30e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vadibun.pbworks.com/w/file/fetch/144874119/zilarememagiwopelugowus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3c65536-0e1f-431a-9250-0b346f2a00a8/53883974764.pdfIn PDF document text
    • http://bemasidi.pbworks.com/f/parallel_and_perpendicular_worksheet_answer_key.pdfIn PDF document text
    • http://wezenibafasi.pbworks.com/w/file/fetch/145165176/physics_class_11_hc_verma.pdfIn PDF document text
    • http://lugozamuxika.pbworks.com/f/20618119911.pdfIn PDF document text
    • http://pajofesuwero.pbworks.com/w/file/fetch/145113546/free_movie_apk_apps_for_android.pdfIn PDF document text
    • http://sazupamufode.pbworks.com/f/cuando_sale_el_diario_de_greg_14.pdfIn PDF document text
    • http://safubudesowi.pbworks.com/f/pixel_truck_racer_mod_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50b03c5f-90b3-4c9c-a902-a636b65d7dd5/79742932109.pdfIn PDF document text
    • http://wigiwopajuke.pbworks.com/w/file/fetch/144634692/94491245186.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3928a55b-db93-42bf-9bdd-1ad156361d08/92393523281.pdfIn PDF document text
    • http://jamexapageku.pbworks.com/f/11215638036.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_off0000db96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB96 5648 bytes
SHA-256: 80828fb5d93380e7870d2421c1dbec3abe554e17838d01af02e1e8805a02a44b
font_01_sfnt_off0000eefc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFC 11464 bytes
SHA-256: 48b97db30d8fac93e808abaf4cbf03b9e4196292ff90756e42bd600c8fba3665