Malicious PDF — malware analysis report

Static analysis result for SHA-256 57d953f7f90a0a03…

MALICIOUS

PDF

81.9 KB Created: 2021-03-31 09:54:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e685ba36d6bb8aac2607391383c17c6e SHA-1: 1b3e4715994b23871b8159eac807117961b036c5 SHA-256: 57d953f7f90a0a03ff833380f54d37479792ee0206a7279923af6c538a6879a9
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 0.9996

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://resalured.ru/123?utm_term=army+records+information+management+system+website PDF link annotation
    • https://cdn.sqhk.co/tabakotodi/jgdjbii/zudenesixiguduxuro.pdfIn PDF document text
    • http://dimax-matrasy.ru/easy_indian_vegetarian_starters_for_dinner_partiesqnxpp.pdfIn PDF document text
    • http://jopkapopka.online/livro_candomblfpcph.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450636/normal_602ad58d6550d.pdfIn PDF document text
    • http://hangzhoumetal.ru/saga_de_harry_potter_libros_originales8ig9y.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480886/normal_5ff90bf0dd582.pdfIn PDF document text
    • http://golden-charm.ru/26546893808bdgg4.pdfIn PDF document text
    • http://menbp.online/blood_toil_sweat_and_tears0yv07.pdfIn PDF document text
    • http://1xbets-reg.site/dovedegtnrb4.pdfIn PDF document text
    • https://degijidugaf.weebly.com/uploads/1/3/4/8/134886203/sofoji.pdfIn PDF document text
    • https://cdn.sqhk.co/silutoge/fcshajj/natural_history_of_rheumatoid_arthritis.pdfIn PDF document text
    • http://securityverifiedservices.com/64491717447svo79.pdfIn PDF document text
    • http://eurozone.pro/craftsman_table_saw_parts_model_137.2189kzyh.pdfIn PDF document text
    • http://normaa-id.com/71989533535siw8.pdfIn PDF document text
    • https://nugenezeni.weebly.com/uploads/1/3/4/6/134632238/muviwelomopupo_sulop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474445/normal_60526c412d065.pdfIn PDF document text
    • http://peludofnor.fun/imca_guidelines_for_dp_trialsdqm7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416659/normal_5fd85d53a60c9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd2abcca-35fe-4533-b233-254641bbc6e8/how_to_fix_a_ice_maker_water_line.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21b5b878-926c-4f8c-ad7e-52b13dd43379/pioneer_fh-x720bt_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b652dc83-8ea3-4b7a-b4fd-1b6f2e7c447f/canon_eos_rebel_xti_400d_lenses.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e16640a5-242c-49c6-ac14-eeccdce1537d/29705458582.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_off000102d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D9 5632 bytes
SHA-256: ab255234c78d66777998ecc54425ba0a8c87a59b9553ad2ba26cd6d72a117b3b
font_01_sfnt_off00011606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11606 10500 bytes
SHA-256: 35407455ffe59b58c134974053233e1156a1720d78255afb66bce807099696c6

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