Malicious PDF — malware analysis report

Static analysis result for SHA-256 61f7ec970855cc50…

MALICIOUS

PDF

77.8 KB Created: 2021-03-25 09:26:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 124a087e931935f02ce88a7758df3466 SHA-1: 9ae6f03b500e63366058236d69d48c70301ee060 SHA-256: 61f7ec970855cc50d949f84308a6598f37dfb49b619e83d668c457dcdbd99516
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/123?utm_term=detroit+become+human+pc++full PDF link annotation
    • http://kakafeg.scienceontheweb.net/vubipedovalosisal.pdfIn PDF document text
    • http://goodsfor.life/39046642364ilfoa.pdfIn PDF document text
    • http://norusezuluwo.iblogger.org/writing_inequalities_worksheet_6th_grade.pdfIn PDF document text
    • http://sokavosutab.22web.org/advertising_campaign_strategy.pdfIn PDF document text
    • https://pununoruvok.weebly.com/uploads/1/3/4/6/134693134/1819207.pdfIn PDF document text
    • http://vitezozikupu.iblogger.org/64312918305.pdfIn PDF document text
    • https://pevidutapare.weebly.com/uploads/1/3/0/7/130740538/8928184.pdfIn PDF document text
    • https://juwomazitebuden.weebly.com/uploads/1/3/1/4/131414743/f214b.pdfIn PDF document text
    • http://rezltml.xyz/zubokodivudepopelogaxebivu7pqh.pdfIn PDF document text
    • http://meetchat.space/63858950855imuyp.pdfIn PDF document text
    • http://carishr.com/python_pandas_groupby_cheat_sheetcku35.pdfIn PDF document text
    • http://kewatupu.scienceontheweb.net/48443170617.pdfIn PDF document text
    • http://zogometemo.sportsontheweb.net/adb_android_tutorial.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fibogexexagiram.rf.gd/handbook_to_higher_consciousness_download.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/wejibimugowofezukavejira.pdfIn PDF document text
    • http://mozaninukokefef.onlinewebshop.net/cauchy_schwarz_inequality_proof.pdfIn PDF document text
    • http://nisetekotixob.myartsonline.com/vifatozerimixavunamazimub.pdfIn PDF document text
    • http://zusamab.epizy.com/what_are_the_different_types_of_sales_organisation_structure.pdfIn PDF document text
    • http://metewerozize.rf.gd/malaysia_lonely_planet_when_to_go.pdfIn PDF document text
    • https://s3.amazonaws.com/sedowedi/general_math_test.pdfIn PDF document text
    • http://karajifaderiwow.epizy.com/mopiduzabuninixulate.pdfIn PDF document text
    • https://s3.amazonaws.com/neporezofov/33540924414.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_off0000f2ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2ED 5216 bytes
SHA-256: 734f1d5443c9bef239767a8d7651a726428b85c8d839fda3c1e5cdfb900b660f
font_01_sfnt_off00010486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10486 11076 bytes
SHA-256: a865a5a72f734c94a3a2b67c2d24135d3f8bee4c8b00cc7351e4bab8363a2d4c

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