Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0fc9bebeaba5b89…

MALICIOUS

PDF

71.7 KB Created: 2021-06-09 13:58:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: aa911b0d83a2d3470b93be87a0120329 SHA-1: d36c069749c0d67d9bf44792cdd3baa93fb27923 SHA-256: e0fc9bebeaba5b89174858572cbbb29885a858f3f2d9337bba99b4b4a4531a8d
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 0.9960

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://huntic.ru/pbw?utm_term=trial+marriage+husband+pdf+free+download PDF link annotation
    • https://xukaxibuban.weebly.com/uploads/1/3/4/7/134701669/fisasava.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454040/normal_5ff21eb45c015.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383449/normal_5fcc5d19bae4b.pdfIn PDF document text
    • https://dudezixibuwido.weebly.com/uploads/1/3/4/5/134529197/759668.pdfIn PDF document text
    • https://koxepaje.weebly.com/uploads/1/3/5/3/135350813/zogujupudewiseguveni.pdfIn PDF document text
    • https://vafoguvisijun.weebly.com/uploads/1/3/4/8/134887412/636085.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462980/normal_6046d7a7e6339.pdfIn PDF document text
    • https://daginunus.weebly.com/uploads/1/3/4/5/134597638/durisatom.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pigikeziba.pbworks.com/f/padman_movie_download_in_tamil.pdfIn PDF document text
    • http://nipekari.pbworks.com/w/file/fetch/144553311/how_to_treat_jugular_vein_thrombosis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea35155f-7b32-4669-9fb2-f5602b9bcbbc/hopa_gamgastar_roman_havas_mp3_indir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02d1a722-6d52-45a5-914a-5b66fe7ea2ca/poduzizokezukusepum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39ca34c8-2645-457f-88d3-ab2ad7900b02/what_size_is_30_x_40_cm_in_inches.pdfIn PDF document text
    • http://xumamiz.pbworks.com/w/file/fetch/144807138/wototozige.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d67e602-065d-423d-a05e-0e1712cd6f3a/learn_ruby_the_hard_way_html.pdfIn PDF document text
    • http://kemulosomul.pbworks.com/w/file/fetch/144729636/the_twilight_saga_breaking_dawn_part_1_full_movie_download_hd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e3639d0-1902-44d7-8116-122859e6a6a6/98363559884.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afcd4ebe-10f1-4603-acf4-5ac1de8415e6/54033625109.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bd151a3-89f6-4175-9ad9-26dbc2fc0c13/how_to_turn_off_carplay_mercedes.pdfIn PDF document text
    • http://pamotekegopa.pbworks.com/w/file/fetch/144446748/why_isnt_my_fios_tv_remote_working.pdfIn PDF document text
    • http://sekodegaxex.pbworks.com/f/27836816966.pdfIn PDF document text
    • http://funinupun.pbworks.com/f/bertelsmann_foundation_transformation_index_2018.pdfIn PDF document text
    • http://suwoluran.pbworks.com/w/file/fetch/144913569/los_secretos_del_inmortal_nicolas_flamel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8130465b-0c71-40d1-9c72-80032792a99c/how_to_join_ramakrishna_math_hyderabad.pdfIn PDF document text
    • http://tujelupirobe.pbworks.com/w/file/fetch/144500871/fusajumilut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/280abc31-e2ae-4251-91a9-ddcf8b329b71/plantronics_cs530.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E9 5636 bytes
SHA-256: b6d131612032a8cd786e1318026e158369f91b781c52fba37a5ec26f94f6c2f5
font_01_sfnt_off0000ecef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECEF 10600 bytes
SHA-256: 34c75dd5ab8252f2137ceb4dac4f7387406146f28ac7583e044aeba458786f75