Malicious PDF — malware analysis report

Static analysis result for SHA-256 4db919cc7b35e4c2…

MALICIOUS

PDF

90.5 KB Created: 2021-05-07 07:43:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 094af8b33b1bba15b6ef402a9310bc00 SHA-1: 9fd61281f08cc1777ef2f367ca03d8d1316c75be SHA-256: 4db919cc7b35e4c2b1d0ffd0ec3608eca1ca2c94bfa6959af0024878fc427597
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a significant number of external links, identified as a PDF link farm, suggesting a malicious intent to redirect users. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URIs indicate a phishing or content distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://seumenha.ru/strik?utm_term=firing+staff+synonym PDF link annotation
    • https://cdn.sqhk.co/xolofiwano/ifSjhgS/tejewinolalebifidebaz.pdfIn PDF document text
    • https://zufuzizulilok.weebly.com/uploads/1/3/4/7/134702460/zokijuwaguvijar-rapuxi.pdfIn PDF document text
    • https://pakidezosatujij.weebly.com/uploads/1/3/0/7/130775723/2652716.pdfIn PDF document text
    • https://cdn.sqhk.co/kekotenonaxu/CHijdpi/codycross_crossword_puzzles.pdfIn PDF document text
    • http://interbankdigital.com/bus_simulator_ultimate_more_routeskavd2.pdfIn PDF document text
    • https://tekujutiwud.weebly.com/uploads/1/3/4/2/134234893/b7f0fec15f06f.pdfIn PDF document text
    • http://yachts-4-sale.com/24405480524d0nro.pdfIn PDF document text
    • http://kittyplay.online/what_drugs_is_benzene_found_insgj1i.pdfIn PDF document text
    • https://cdn.sqhk.co/keridola/vXZbhg4/juvadofirezexavovajuji.pdfIn PDF document text
    • https://gixawixo.weebly.com/uploads/1/3/4/3/134322292/vidige_jinis_tusok.pdfIn PDF document text
    • https://tiwofimobodes.weebly.com/uploads/1/3/4/0/134040820/zefexufifejuza.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/zumomasugipeno/spider_man_comic_book_images.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbe1a326-d57b-4c47-8fcc-c58848ce23ac/32206303622.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/fimuxisamerufuxejegofezer.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/3065277993.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/35948704533.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/michelin_star_guide_2019_nyc.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/cat_translation_software_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97ebd586-87fc-4b70-ac3b-b92f8d7cd183/vapejinogemiwukuwebi.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/columbus_ms_drivers_license_phone_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e60ad50-99d4-463d-a743-a9c13ab991df/zuzapisawamufibujebaboj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26712184-6054-45bc-87b7-d89e7ce3b13a/repin.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/croup_rch_fact_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/oracle_sql_developer_data_modeler_for_database_design_mastery.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_off00011784.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11784 5112 bytes
SHA-256: ecf8a69b52b5444fee2357e8113c7366ed279ec8cb09b267cdde942a365ccf8f
font_01_sfnt_off000128e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128E8 17144 bytes
SHA-256: fad1dfe8a249c9b226dcaf93e4a0923f67c615c8d1e46a732438a141a81409d5

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