Malicious PDF — malware analysis report

Static analysis result for SHA-256 b712931bb87a3618…

MALICIOUS

PDF

66.9 KB Created: 2021-02-09 08:44:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 61ff3cd60af070f1971ce9b054ae445d SHA-1: fa7aa6a1ad340892e7cadf5346ddd29836760225 SHA-256: b712931bb87a3618844a50c52fb6661bfd099b40c934bcb43b1fb53ba5457142
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://crophysi.ru/wb?keyword=3rd%20eye%20full%20movie In PDF document text
    • http://kigazuvunawolux.iblogger.org/chakram_cinema_songs_telugu.pdfIn PDF document text
    • http://salet.store/46631339749jly44.pdfIn PDF document text
    • http://www-sfr-fr-monespace.com/software_estimation_demystifying_the_black_art_free_downloadf3enx.pdfIn PDF document text
    • http://mefazezotaw.22web.org/adobe_stock_photos_free.pdfIn PDF document text
    • https://delovamubikener.weebly.com/uploads/1/3/4/7/134707073/bed1f9c54c8.pdfIn PDF document text
    • https://cdn.sqhk.co/gebitasixa/jih3idT/bootstrap_website_templates_free_download_w3layouts.pdfIn PDF document text
    • https://cdn.sqhk.co/vagizabibo/9zgdU7n/potune.pdfIn PDF document text
    • http://netekigupi.22web.org/bajirao_mastani_song_pk.pdfIn PDF document text
    • https://cdn.sqhk.co/pefevepufi/Kohf4YS/586072659.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/xupovobejanam/allegiant_air_app.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/36211636660.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/lonezolomel.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/28834014188.pdfIn PDF document text
    • http://vafukibugaf.epizy.com/dghs_applicant_copy.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/fairy_fencer_f_advent_trophy_guide.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_off0000c9b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9B0 4896 bytes
SHA-256: 898ab5d7628fbc51b021e0eb3eecd2515763ab68a5878bda791298368a0fe37c
font_01_sfnt_off0000da56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA56 10776 bytes
SHA-256: a355aa10fd2dd5093e99c549140fe90070acff52cdc3a62a42afe1833f8934d1