Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3b3d1220d333dcf…

MALICIOUS

PDF

127.6 KB Created: 2021-04-01 05:05:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7cc4249c61283e6fbd2b2b3e6c347104 SHA-1: 5b8754b83ee2d91a850e5ec87827428e6e1cc5e1 SHA-256: c3b3d1220d333dcf212ff33b57f4d30841c691e4b9b06ecf6585dc698a889d32
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 0.9999

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://nipisod.ru/award?keyword=agile+software+development+methodology+pdf PDF link annotation
    • http://paselon.getenjoyment.net/comic_storyboard_creator_free.pdfIn PDF document text
    • http://vegoletox.medianewsonline.com/everything_i_never_told_you_book_download.pdfIn PDF document text
    • https://cdn.sqhk.co/donoluri/ahceZOV/google_account_manager_apk.pdfIn PDF document text
    • http://medilawibume.scienceontheweb.net/28841063803.pdfIn PDF document text
    • http://deweretiwusoxo.22web.org/adding_subtracting_multiplying_and_dividing_mixed_fractions_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/zuzipogowita/fFBZEvR/rokimotamiludebofawogol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7a512b58-7189-4bc4-8343-f643fa9054c9.filesusr.com/ugd/1e52da_04fdaf9ad8dc4115a2abbb228a9af91b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0aa8001-5bd8-4c3d-a27b-22b33bd6608c/vavofosakude.pdfIn PDF document text
    • https://02274cc9-8b57-4441-be19-e46c089ec46b.filesusr.com/ugd/f11b8f_3961fcba7b454c29b46292e680aa43e5.pdf?index=trueIn PDF document text
    • https://07d68bf2-0661-47e2-9ffe-eae068a071af.filesusr.com/ugd/fef806_5fac6f4429104a999713f58fec198cbd.pdf?index=trueIn PDF document text
    • https://7ec9ed57-df89-401a-953b-45744c150cee.filesusr.com/ugd/6e3131_3d31f6977cbc40f4bfe124e9dceb12d0.pdf?index=trueIn PDF document text
    • http://dezinolabebosod.atwebpages.com/mixujokolegi.pdfIn PDF document text
    • https://60b161a2-b511-46bc-b48c-7ca4331f2db3.filesusr.com/ugd/34b71b_a481cffd8ef84d63adeb24e9f7973bf2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b22b7d7-fc4f-4787-93b7-84ac118c13d5/37483308833.pdfIn PDF document text
    • https://98cdd5c5-c43e-49eb-9373-39517e896cbb.filesusr.com/ugd/90661f_cf035eff8f9540658d360ad4f78ea39e.pdf?index=trueIn PDF document text
    • http://pudevagaradala.epizy.com/64124476232.pdfIn PDF document text
    • http://pifimofizo.rf.gd/bajitodurudugivujefutep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d9a0f26-99c7-4285-a3fc-630a98be42bf/de_que_trata_la_obra_de_romeo_y_julieta_resumen_corto.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B510 5696 bytes
SHA-256: dc2b113e18c1399e156b5a7039182cbfb91c93676ec27201891d18e051446926
font_01_sfnt_off0001c86f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C86F 11984 bytes
SHA-256: 9a640b140ac29422c1b05f9c0aa21b26f4ab292a28a595f020b5d7e6fbbca422

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