Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c2f71507f7348ed…

MALICIOUS

PDF

100.6 KB Created: 2021-05-16 11:14:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e19f87b350378892630d6654af163c95 SHA-1: c4d37ba6269264c21db2e32aca2599e29045ad04 SHA-256: 3c2f71507f7348ed485f44068b5e8bdb7c209c3171c077538da43ed5b611697a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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://resalured.ru/strik?utm_term=does+odysseus+sleep+with+circe PDF link annotation
    • http://pinenud.mygamesonline.org/46668611762.pdfIn PDF document text
    • http://spiritstudio.ru/42723032207x28fr.pdfIn PDF document text
    • http://vuzetasavuxoso.mygamesonline.org/32988552036.pdfIn PDF document text
    • http://dafesoxexigu.medianewsonline.com/jifutiri.pdfIn PDF document text
    • http://zorugukuremired.22web.org/how_to_reset_belkin_router_after_power_outage.pdfIn PDF document text
    • http://levantegroup.net/psychology_final_exam_answers_quizleto621f.pdfIn PDF document text
    • http://pegejoruvufiron.sportsontheweb.net/cristianismo_primitivo_e_paideia_grega_werner_jaeger.pdfIn PDF document text
    • http://maxist.ru/bagivqqirh.pdfIn PDF document text
    • http://zonixutazexe.iblogger.org/samson_agonistes_bengali.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f904ef53-caa1-4f0f-8a97-c50675c03ece.filesusr.com/ugd/2f8cea_eee87373abca464783d60ef3ebf9f35f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/19d3edc6-5645-447e-b001-7046260098fc/jalowimasabu.pdfIn PDF document text
    • http://mivazofirogo.epizy.com/kowixamubesasovulomesum.pdfIn PDF document text
    • https://5613ab86-cfe5-4642-b9e1-29ab5e510d76.filesusr.com/ugd/79e000_e7dd252857374164a06ce0e6b1905bb6.pdf?index=trueIn PDF document text
    • http://ropurudowilume.rf.gd/mbbs_1st_year_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b0d75ef-3ad3-4f74-b4cc-4a42c39d0748/craftsman_6.0_lawn_mower_carburetor_kit.pdfIn PDF document text
    • https://1ffb5d6c-d890-49e0-9b87-dc10fbfa49e2.filesusr.com/ugd/8bc2a6_305e40e569874c41ada41eb6237a184d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecd89766-82e7-4188-a95c-a406d477711f/panasonic_th-42px75u_wall_mount.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e54c962-cc11-4376-a90f-5def870a7788/32513485357.pdfIn PDF document text
    • https://48cc712b-de5e-493e-a198-f8962849e22b.filesusr.com/ugd/d2751c_49fb1ea406eb42c6b288186273179315.pdf?index=trueIn PDF document text
    • http://fararisujis.myartsonline.com/convert_to_word_using_automator.pdfIn PDF document text
    • http://nuzekifigusibu.rf.gd/93813497357.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/815e2463-6e20-4b5a-8522-07f17e83fff9/is_zotero_compatible_with_endnote.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_off00014d9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D9C 5144 bytes
SHA-256: 67565151a1b8a539c8b8139c4ee7ae6106f63b73c5068ad0d07b287c26cf8225
font_01_sfnt_off00015f38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F38 11640 bytes
SHA-256: 4d87e5bcc9bb7e26f608aa3e1a65f2f716137a6f45b6f31f2fb2f80442b42171

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