Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf698615de239e91…

MALICIOUS

PDF

77.2 KB Created: 2021-06-10 21:09:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: e4615bd33af34ccf2be7ba064d4877f0 SHA-1: edfbfa165df0f1ba385ac72ed63342eb827e6dd9 SHA-256: cf698615de239e91b1b07b5f7d2e1edee0f145ced4c5901ea3ac7fc714e87341
126 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with a significant portion pointing to disposable hosting and employing UTM parameters, indicating a potential phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a link farm designed to obscure malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/123?utm_term=guided+archery+elk+hunt+colorado PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4391315/normal_601b3b6dc9949.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4423431/normal_60b71d57a1dd2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420018/normal_6034dff7c43db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493209/normal_605588e605719.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4449965/normal_60afecb2204fd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407804/normal_5fffcbcea4fcc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367289/normal_605c721a2f614.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jizakatum.pbworks.com/f/sampling_distribution_problems_and_solutions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41ab2f80-ade5-448d-b87b-24d95aac213e/23557381933.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33235c96-cacd-4c74-baa5-b53e22862aa2/toyota_corolla_2016_key_battery.pdfIn PDF document text
    • http://kevesefazoga.pbworks.com/w/file/fetch/144685959/preguntas_para_desarrollar_el_pensamiento_critico_en_los_nios.pdfIn PDF document text
    • http://kuxuraroj.pbworks.com/f/the_untamed_book_english_translation.pdfIn PDF document text
    • http://safubudesowi.pbworks.com/f/kabir_singh_full_movie_with_subtitles.pdfIn PDF document text
    • http://xuruzinijub.pbworks.com/w/file/fetch/144425556/rativoxenotepax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/245e682a-76e9-414e-9106-93ed77d2e274/jefetafedawomonojozaje.pdfIn PDF document text
    • http://gatasulupu.pbworks.com/w/file/fetch/144958608/main_tera_bf_tu_meri_gf_punjabi_song_mp3_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52756490-1b85-4dad-98a0-d4a1b6f5bf47/14704307978.pdfIn PDF document text
    • http://sorawako.pbworks.com/f/49788320313.pdfIn PDF document text
    • http://tagutijak.pbworks.com/w/file/fetch/144966309/ma_organisational_psychology.pdfIn PDF document text
    • http://jufugoxula.pbworks.com/f/simple_present_tense_reading_worksheets.pdfIn PDF document text
    • http://lajunola.pbworks.com/w/file/fetch/144877959/segemawifevakez.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_off0000ee95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE95 5048 bytes
SHA-256: 04df912d6be05ad2dc3d7f1ef8b4d6fd42fd0f22acadb38a8498e777180ebae2
font_01_sfnt_off0000ffc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC4 11212 bytes
SHA-256: 8af8a26e2469f2bdb42ee3e2ef9148156618b182c981cc8f2d8c315cfb472566

Open this report in the interactive analyzer, or submit your own file for analysis.