Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e9435a1f3ef59b8…

MALICIOUS

PDF

72.2 KB Created: 2021-03-08 13:51:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e57cbf208e927d7ad46e7b9b08177869 SHA-1: d0552da9b00ac16026eecab4f7649b3786030343 SHA-256: 0e9435a1f3ef59b8e91caf4f9b96becc7d7220d575f982e4a5d70aa391654262
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9983

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://jumiwimov.ru/award?keyword=methods+of+amending+the+constitution+pdf PDF link annotation
    • http://ecoterritory.store/mifatasowuvijibowupagifzqic.pdfIn PDF document text
    • http://daimontimur.org/64453240746zzrjr.pdfIn PDF document text
    • http://obzorov.site/farm_heroes_saga_cheats_level_821civms.pdfIn PDF document text
    • http://comforfemj.fun/red_waffles_diseasei7aco.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495691/normal_604188ec52f7b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501996/normal_5ff3b308d93e1.pdfIn PDF document text
    • http://megatorg.ru/wutuwi64xo1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://20128683-61eb-4207-b985-d468b1a81fea.filesusr.com/ugd/0049ca_3c9bc29780224407abb4bc6837adbbc2.pdf?index=trueIn PDF document text
    • https://7605d98d-8b17-4a41-9383-f5c8d5af9bcc.filesusr.com/ugd/2bed4c_d0ce080ea39a405cb89671d278a1032e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/vinumefulafob.pdfIn PDF document text
    • https://e4fb9bf1-a3d6-4767-9bf2-2a1021e5dc09.filesusr.com/ugd/53cfc7_6a9a85dd27c94d3784504cd99a0c1705.pdf?index=trueIn PDF document text
    • https://30d6ba4c-d201-4e26-8f31-a0e059b28788.filesusr.com/ugd/f9b8bb_c1d8f4aac56d4234acae6328535c5f48.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/bujubunilanukonulo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23d8468a-ab0d-4c65-9c29-96adb7303f32/pifofebosipupimu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e945ee8-9aa9-4949-9109-d0ae1ab065d8/ms_word_shortcut_keys_list.pdfIn PDF document text
    • https://58c039e8-67b9-440d-b216-5500198d4781.filesusr.com/ugd/c4dbd3_5fcc3680017243369e983736325c4f21.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca7152db-2b54-46aa-bddc-7e2cfd02c3cf/27777021650.pdfIn PDF document text
    • https://d12e84a0-9808-45da-82c6-613dfe540d1b.filesusr.com/ugd/dc8a8e_70871313642d4eb3bf1ae93a7a2cc76f.pdf?index=trueIn PDF document text
    • https://c8a164a7-2549-4056-b209-d27d417f800b.filesusr.com/ugd/136d3d_3168e27460a146d8a10eee15264b731e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/791e2d07-f373-4e98-83eb-6ff4cc4ae407/88674566776.pdfIn 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_off0000e514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE514 5444 bytes
SHA-256: a5453d14283db29ec2fa517a8885363827ed7fe569f8e5abe4320146cc0f1167
font_01_sfnt_off0000f78a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF78A 10540 bytes
SHA-256: 993e2cc85472020b1710bd39c2f82c55b984d3b0112ca77babcec226f0ace099

Open this report in the interactive analyzer, or submit your own file for analysis.