Malicious PDF — malware analysis report

Static analysis result for SHA-256 42cca30e3b02df57…

MALICIOUS

PDF

77.6 KB Created: 2021-03-14 10:40:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a96ce8c99d4875b6679358b36204fda2 SHA-1: b074f5b99ea2b43dd0d8aa5aeecd95f24a283ce1 SHA-256: 42cca30e3b02df57bbe233b5d34b1238fed9f5c186d8cd51c3871741dccb4a1c
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 0.9992

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://gimoguvi.ru/123?utm_term=flattering+formal+dress+for+apple+shape PDF link annotation
    • https://cdn.sqhk.co/nugizape/HrhcIge/birusaxa.pdfIn PDF document text
    • https://cdn.sqhk.co/duwokarewesu/Jif8lhc/68391725923.pdfIn PDF document text
    • http://dufifudusimube.mygamesonline.org/nobox.pdfIn PDF document text
    • http://jotafitosixa.getenjoyment.net/le_coche_et_la_mouche.pdfIn PDF document text
    • http://xikisavi.scienceontheweb.net/zezeki.pdfIn PDF document text
    • http://feludekinopotas.scienceontheweb.net/what_is_the_difference_between_brother_serger_1034dx_and_1034d.pdfIn PDF document text
    • http://fujigukatujewu.medianewsonline.com/82279804586.pdfIn PDF document text
    • http://rolopigabetitu.scienceontheweb.net/bronchiolite_du_nourrisson.pdfIn PDF document text
    • https://riwaxetonebena.weebly.com/uploads/1/3/4/3/134363930/doxexusugiro-padipinabos-zepejam.pdfIn PDF document text
    • https://taretowixulu.weebly.com/uploads/1/3/1/0/131070971/redopuxosubaritonere.pdfIn PDF document text
    • http://keruluzo.medianewsonline.com/free_converter_to_word_software_download.pdfIn PDF document text
    • https://boxesagako.weebly.com/uploads/1/3/4/5/134589877/0a433a7f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vilatelisoto.onlinewebshop.net/tozaliga.pdfIn PDF document text
    • http://rijuteso.epizy.com/25621939907.pdfIn PDF document text
    • http://rekekolulopar.rf.gd/the_communist_manifesto_ao3.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/90557354230.pdfIn PDF document text
    • http://zasidad.epizy.com/82893526178.pdfIn PDF document text
    • http://laganomezavarof.epizy.com/19637647797.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/86524717955.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/roku_2_xd_still_supported.pdfIn PDF document text
    • http://zozadugaweguj.epizy.com/list_of_abbreviation.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/bewekagutazebetonewibage.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/23313676264.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_off0000f37c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF37C 5412 bytes
SHA-256: 1dc4070d20a2089adeaa441efba99cc1b65124caec786309935fac3e49d00ce4
font_01_sfnt_off000105ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105BA 10260 bytes
SHA-256: dc8f768310da72c0f1e287b65f0b0b3990d84c4648f8cf48c50532b5aefcfae4

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