Malicious PDF — malware analysis report

Static analysis result for SHA-256 d32bf4639eccad25…

MALICIOUS

PDF

85.0 KB Created: 2021-05-21 23:05:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 680ac09544740fddf1136df1122eff2f SHA-1: 2ec383b5b8d8d1a8eac502c1454fd7dfa4f3d62f SHA-256: d32bf4639eccad25366595796fde27a526091213caab99025dd39baed2ada97c
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting an attempt to manipulate search engine results or redirect users to malicious content. One of the primary external URIs points to 'bologen.ru', which is likely a phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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 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.
  • 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://bologen.ru/strik?utm_term=what+does+it+mean+when+a+man+says+my+woman PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4424996/normal_602b3e9dd947d.pdfIn PDF document text
    • https://jetebudatupa.weebly.com/uploads/1/3/4/7/134748577/sadokezifeba.pdfIn PDF document text
    • https://duxuxapuxud.weebly.com/uploads/1/3/5/3/135332588/kunelamurif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366666/normal_60594626b277c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453551/normal_5fcc0c28e7895.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497638/normal_6031fdc810f85.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418788/normal_6002ed951ba9d.pdfIn PDF document text
    • https://zoninezazazi.weebly.com/uploads/1/3/1/0/131070362/0fb15b1868fc5.pdfIn PDF document text
    • https://kusipujetaz.weebly.com/uploads/1/3/4/4/134462876/136177.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/putelekireza/blue_is_the_warmest_color_graphic_novel_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/bevekapegemesobuxon.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/half_yearly_exam_chemistry_answer_key_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/xokavosadim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2559a8e7-92a8-4f98-a5d2-2ee65ab106ba/dr_seuss_books_read_to_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e163eaab-cb9f-465d-90b7-c5b2e2e36c00/english_test_for_beginners_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/bewofok.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/what_words_rhyme_with_51.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/bye_bye_blackbird_satb.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/chicago_manual_of_style_endnote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e283468d-eea7-4075-85e9-7a2adf31a14a/negaberogaxepoloxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cd71b9c-6951-44ad-90eb-ba3e45c62553/xopulolef.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/lekukumetezi.pdfIn PDF document text
    • https://s3.amazonaws.com/jupoti/36530259576.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0edc355-a7f4-4516-8d77-e30933614cf2/how_long_does_a_dyson_battery_last.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/vojewarigem.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/astro_file_manager_mod_apk.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_off00010d31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D31 5144 bytes
SHA-256: 20777b66455923aa2f3f7fe3ac9c3042575ab87b049c02642730e1356e545284
font_01_sfnt_off00011ea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EA7 11020 bytes
SHA-256: 0b608c1cbdf2912b8fdcf9a10c450dc80855eab53757c3d9212c0d2c1226c748

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