Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b2c56548790844c…

MALICIOUS

PDF

74.2 KB Created: 2021-06-12 21:53:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b32889f28b11390924e8dd52aa616132 SHA-1: 1f21a9a5dfea15cee1dadfe9b6dbb1b3bcf4535d SHA-256: 3b2c56548790844ca22afcb706496513396f26812adc43b1a93f599c5b842e07
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting, suggesting a link farm designed to obscure the ultimate destination. One prominent URL, "https://nomylo.ru/pbw?utm_term=telegram+bollywood+movie+channel+link", is presented as a lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://nomylo.ru/pbw?utm_term=telegram+bollywood+movie+channel+link PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4419654/normal_601d257ff14ca.pdfIn PDF document text
    • https://suzefajadovu.weebly.com/uploads/1/3/4/5/134592553/0a83952fd883e.pdfIn PDF document text
    • https://zizobisorodevu.weebly.com/uploads/1/3/5/9/135964877/lobonaka.pdfIn PDF document text
    • https://wibanakipose.weebly.com/uploads/1/3/4/3/134361509/vodedukoso-kamizu-genom-sugapal.pdfIn PDF document text
    • https://bonorira.weebly.com/uploads/1/3/5/3/135346760/guwefasul.pdfIn PDF document text
    • https://rutobugexamaxip.weebly.com/uploads/1/3/4/5/134508198/pipelopowevowil_towanetu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369163/normal_5feca098020d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446401/normal_602a41bf84af5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gaguwufajij.pbworks.com/f/fupesitixogitekazalaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d1659df-e842-4ae5-98db-db90b90d36a2/kant_critique_of_pure_reason_amazon.pdfIn PDF document text
    • http://wamotarirup.pbworks.com/f/how_to_install_a_wireless-n_wifi_repeater.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8a7a558-f2c5-4b76-9e2f-b3b981e52685/the_art_of_raising_a_puppy_audiobook_free.pdfIn PDF document text
    • http://deduxofevit.pbworks.com/f/cryptocurrency_for_dummies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed60b527-3860-41fa-8a48-15ed02f3256e/gaxiguxa.pdfIn PDF document text
    • http://ritijix.pbworks.com/f/13444093471.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e60162a9-23b3-4cac-9fde-410b1c9c7dd5/rajesojitowokuwiweleleno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/314b2aca-f7d9-4490-a2a0-378b092bc4df/quran_pak_with_urdu_translation_word_by_word_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac462379-30c4-4cb8-acd0-79f1b559fa2e/what_does_e1_f3_mean_on_a_whirlpool_washer.pdfIn PDF document text
    • http://pilujibos.pbworks.com/w/file/fetch/144603219/fotivupuravagotumozori.pdfIn PDF document text
    • http://dojejezo.pbworks.com/w/file/fetch/145001109/2078924859.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06ca87d9-d60a-444c-ae1b-bf9fc529773a/bissell_spotclean_proheat_pet_portable_spot_and_stain_carpet_cleaner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9eef60c8-c1ce-47ab-8112-c457c4c10a0f/koxifujesasupe.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9DE 5580 bytes
SHA-256: 4d3f3be0d4a8ec0027f88eac22282eaba530745f9d27f6793eee999996575e59
font_01_sfnt_off0000ecbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBB 1896 bytes
SHA-256: 9ac488501cf383c9bdea4e9ab2b538d4abf353152eaac64f25895925cc38087a
font_02_sfnt_off0000f5d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D3 10192 bytes
SHA-256: d108100058450de623a1675ae21ac7a7f3503dfd2def7aec939751450eeb6c56