Malicious PDF — malware analysis report

Static analysis result for SHA-256 1794787fd05df92d…

MALICIOUS

PDF

87.3 KB Created: 2021-03-25 15:19:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: bdd2262cfcafa18809c9b5927c2de462 SHA-1: 4886323d24bb068ccfb9ffd2b0413bb9af2aaa9e SHA-256: 1794787fd05df92d04c4d02f7d2156fa0be23c3b3619d719e17a20b0dfa0ec9a
186 Risk Score

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 0.9993

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://xezojetit.ru/123?utm_term=fitbit+charge+2+heart+rate+size+guide PDF link annotation
    • https://lomimasexoguxi.weebly.com/uploads/1/3/4/7/134736135/7970533.pdfIn PDF document text
    • http://everydays.space/28571912494vi6w8.pdfIn PDF document text
    • http://sberin.xyz/6132137854v964q.pdfIn PDF document text
    • https://lokawinopigu.weebly.com/uploads/1/3/2/7/132712062/e343cdc803d2205.pdfIn PDF document text
    • http://watenaz.iblogger.org/mudubadagadutezezipurevo.pdfIn PDF document text
    • http://kukushpa.fun/63745806388hkhlw.pdfIn PDF document text
    • http://wododepovu.iblogger.org/mca_cet_2019_application_form_date.pdfIn PDF document text
    • https://gitapizi.weebly.com/uploads/1/3/2/6/132683136/9722012.pdfIn PDF document text
    • http://differencecheats.net/66553500702i5tg9.pdfIn PDF document text
    • http://elinekici.online/raxalaxuru71fqm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8084a2ae-6cfb-493d-8155-0d4219c0f7e3.filesusr.com/ugd/5b3528_24c9a8505532489a8456544d2ab8d8a0.pdf?index=trueIn PDF document text
    • https://9305c775-266c-4126-9ef9-90a5cffee957.filesusr.com/ugd/c3f88d_664001deb8a947e6bdbcc2ed7eea7f2d.pdf?index=trueIn PDF document text
    • http://tokafibalo.epizy.com/what_is_manual_setting_on_pressure_cooker.pdfIn PDF document text
    • http://nanizezuzodujo.epizy.com/concept_of_socio_economic_development.pdfIn PDF document text
    • http://pexomesukifek.epizy.com/35581284550.pdfIn PDF document text
    • https://9b704b87-3668-414c-a24e-b30400fe0e33.filesusr.com/ugd/51c472_58af4b1b2c5e4a839442d4db864f7f0a.pdf?index=trueIn PDF document text
    • http://miwirunutepebol.epizy.com/setukosukiwigafakuviwo.pdfIn PDF document text
    • https://07bd7893-a6ec-44d5-90fe-c719e602c0bd.filesusr.com/ugd/aafaff_22ec7cfd22f64fc18100b1478dc119ce.pdf?index=trueIn PDF document text
    • https://1c437d0a-cccb-4a8a-93f1-39e0b5126915.filesusr.com/ugd/b91566_d8319bd564a84eb497967da550ecde65.pdf?index=trueIn PDF document text
    • https://0e733887-fd72-4d21-8b10-0a39cafbc931.filesusr.com/ugd/1e4d10_2f84386a38c14c0a906661782f42c8c5.pdf?index=trueIn PDF document text
    • http://gezuvemun.rf.gd/43562660827.pdfIn PDF document text
    • https://34e51215-b586-4e01-b3ea-a219475a7b91.filesusr.com/ugd/46481b_2b34aa295161413193bed9ee4fe028bd.pdf?index=trueIn PDF document text
    • https://297de083-771a-4730-a3b8-a2afe8c7d209.filesusr.com/ugd/47424f_f10d5eb8a2bd4e79a1943fd2e5f2187a.pdf?index=trueIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001165f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1165F 5448 bytes
SHA-256: a60034ffe16cf4914be162deb6fb7d160f82610ed210b3671dab16b0a1d1dcae
font_01_sfnt_off000128e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128E5 11400 bytes
SHA-256: 8c69ef0b75bf9166c2fc9056304b5d44e9bb23746adae5c2ac287272a2e66546