Malicious PDF — malware analysis report

Static analysis result for SHA-256 b697abae393449f9…

MALICIOUS

PDF

73.8 KB Created: 2021-03-28 21:16:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 1395fb37e731a5c26fe75d47091ee335 SHA-1: a264cfb2339d91ee8c718db17144b41f768f2b6f SHA-256: b697abae393449f92613022febc01ce83e4318653575603638f2198d618a93ce
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URLs, with at least one identified as a potential phishing lure. The presence of embedded URLs and the overall structure suggest it's designed to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://lozipotod.ru/award?keyword=add+ing+to+verbs+exercises+pdf PDF link annotation
    • https://tadonajates.weebly.com/uploads/1/3/4/3/134319020/linakumaxeg.pdfIn PDF document text
    • https://pupiwukonavi.weebly.com/uploads/1/3/2/6/132682553/mamiwizumusowikikedo.pdfIn PDF document text
    • https://kazofinuso.weebly.com/uploads/1/3/4/3/134369681/3c9d51e1f44.pdfIn PDF document text
    • https://rofekituluz.weebly.com/uploads/1/3/2/3/132303072/kirulelugi_nejib_nonozovuvororap_xixutexosogiro.pdfIn PDF document text
    • https://vefonero.weebly.com/uploads/1/3/1/0/131070196/3d1c004.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416661/normal_604b72b7a6c00.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411503/normal_5ff29d39b9df9.pdfIn PDF document text
    • https://dizivabuzazelu.weebly.com/uploads/1/3/4/0/134017784/waxusejano_xapubifiwuweni_titepuneja_zaxagi.pdfIn PDF document text
    • https://jedadizonavo.weebly.com/uploads/1/3/4/7/134721040/lejepif.pdfIn PDF document text
    • https://wufonujixu.weebly.com/uploads/1/3/4/3/134386315/wemasopetuzakiwiwez.pdfIn PDF document text
    • http://gopekulodu.22web.org/59518899254.pdfIn PDF document text
    • https://voguxobone.weebly.com/uploads/1/3/1/3/131379379/4352853.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2ddedb0e-b7b0-41c9-a8bc-c018bd0e6e4c.filesusr.com/ugd/70094d_2c8a16e2de244c08b63be9ca84a3b306.pdf?index=trueIn PDF document text
    • http://novizem.rf.gd/spreadsheet_id_google_sheets.pdfIn PDF document text
    • https://0c43c058-97b3-435a-b041-a9f001bfa883.filesusr.com/ugd/791d74_442c254a7fa445b49990f7cab5bd3f3c.pdf?index=trueIn PDF document text
    • http://jurixosemur.epizy.com/rosuloje.pdfIn PDF document text
    • http://baverasoge.epizy.com/kimazudipejalo.pdfIn PDF document text
    • https://f61a8d15-835b-4c36-a3db-e4ead73ab13f.filesusr.com/ugd/e9f5f3_999e967a0aaa4554914b8d91528d111e.pdf?index=trueIn PDF document text
    • https://ebd157e6-94c3-4ff5-b3ab-516f87acbde6.filesusr.com/ugd/e87473_23eb67206f1f471a9cd3794ffa7bba23.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dea0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA0 5340 bytes
SHA-256: dcb88ea36048792c1c60bdcf77105903b2a4d72899f6d833bc625ae071561dd2
font_01_sfnt_off0000f0eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EB 11424 bytes
SHA-256: 96ee304e200467c878afb309c10d919fe199690cf9c7bca280257a428070c75f

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