Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bf596bd9b20fe39…

MALICIOUS

PDF

76.1 KB Created: 2021-06-05 14:58:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: e130911b1d3865f849124247bbc2f234 SHA-1: a2fd0c43ac61ebe690e3d4c60255d56c747e4112 SHA-256: 1bf596bd9b20fe39b72684288096f9ccb21a7a1d2464b7d427bdbae216ced2ac
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many hosted on disposable domains, indicative of a link farm. ClamAV detected this file as Pdf.Phishing.Trojan, and one of the embedded URLs, 'https://coretry.ru/pbw?utm_term=pomada+encarnita+farmacia+paris', suggests a potential phishing lure related to pharmaceutical products. The presence of numerous links points towards an attempt to manipulate search engine results or host malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4565

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 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
  • 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://coretry.ru/pbw?utm_term=pomada+encarnita+farmacia+paris PDF link annotation
    • https://siresikewutawin.weebly.com/uploads/1/3/0/7/130739490/8c401050.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403264/normal_6007d2ce39d25.pdfIn PDF document text
    • https://renunuvejo.weebly.com/uploads/1/3/4/7/134710344/kuzozedaxaxulis.pdfIn PDF document text
    • https://gozezitigaja.weebly.com/uploads/1/3/4/3/134340412/08183608b.pdfIn PDF document text
    • https://dururamud.weebly.com/uploads/1/3/4/8/134846475/90f15575.pdfIn PDF document text
    • https://renokiva.weebly.com/uploads/1/3/4/3/134353994/9612215.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482027/normal_5ff9dd1c0c979.pdfIn PDF document text
    • https://purubagenipobeb.weebly.com/uploads/1/3/1/3/131398544/6c8eb02962.pdfIn PDF document text
    • https://fogipomovilop.weebly.com/uploads/1/3/4/0/134018275/jumesilewa-vesarukozo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454438/normal_601520c05a5eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427528/normal_603bfffa29b59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485579/normal_60464455401b5.pdfIn PDF document text
    • https://jipovosu.weebly.com/uploads/1/3/4/7/134728388/5d421eb60c677e.pdfIn PDF document text
    • https://nepufetok.weebly.com/uploads/1/3/1/4/131438640/kenemupewatuwapexexu.pdfIn PDF document text
    • https://woniwawel.weebly.com/uploads/1/3/4/1/134109026/4271664.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://niluputevi.pbworks.com/f/short_reading_comprehension_passages_esl.pdfIn PDF document text
    • http://kapetipubi.pbworks.com/w/file/fetch/144426462/mit_lock_picking_guide.pdfIn PDF document text
    • http://fixiguru.pbworks.com/f/descargar_windows_10_gratis_32_bits_espaol_mega.pdfIn PDF document text
    • http://zemenifinabe.pbworks.com/f/17198002891.pdfIn PDF document text
    • http://joraxakegeg.pbworks.com/f/amazon.com_mytv_enter_my_code.pdfIn PDF document text
    • http://rumusapage.pbworks.com/f/naruto_online_mobile_english_version_download.pdfIn PDF document text
    • http://masawumel.pbworks.com/w/file/fetch/144420309/composicion_del_aire_alveolar_y_atmosferico.pdfIn PDF document text
    • http://nadupodifado.pbworks.com/f/can_you_rebuild_a_hydrostatic_transmission.pdfIn PDF document text
    • http://jotoxipigi.pbworks.com/w/file/fetch/144579792/what_do_you_eat_on_30_day_challenge.pdfIn PDF document text
    • http://jujirafamena.pbworks.com/w/file/fetch/144655230/facebook_photo_downloader_chrome.pdfIn PDF document text
    • http://pokatufaxi.pbworks.com/w/file/fetch/144597216/php_mvc_tutorial_step_by_step.pdfIn PDF document text
    • http://sizolasipape.pbworks.com/w/file/fetch/144577779/35335596059.pdfIn PDF document text
    • http://nugewil.pbworks.com/w/file/fetch/144651201/notirudodubex.pdfIn PDF document text
    • http://volikedejefa.pbworks.com/w/file/fetch/144651756/krause_and_becker_airless_paint_sprayer_harbor_freight.pdfIn PDF document text
    • http://kokoxudalux.pbworks.com/f/muzuwofububi.pdfIn 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_off0000f19c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF19C 5060 bytes
SHA-256: fa7d9f8a5f86667aaa1a93304b1775b6ec3440449a0263d51b5f30c70d07e2cf
font_01_sfnt_off000102a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A4 11928 bytes
SHA-256: a622fc80c6ee982bb27871498dbd992c5276aa004d1e3faf5ba7a6ebc5e32530