Malicious PDF — malware analysis report

Static analysis result for SHA-256 75b87b632df99fd5…

MALICIOUS

PDF

73.3 KB Created: 2021-02-12 07:24:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8bbc9f550dfcb149ce725350ab07c512 SHA-1: 2376c79bdf7073ab6aaab43ed71f1741518ec1dc SHA-256: 75b87b632df99fd56fb9566b72e04cf350baf2016926d70b7c81b996a371eb8e
196 Risk Score

Malware Insights

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

The file is a PDF containing numerous external links, many of which point to redirectors and potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_SEO_UTM_REDIRECTOR_LINK' heuristics. The ML classifier and ClamAV also flagged this PDF as malicious, specifically as a phishing or trojan variant. The embedded URLs suggest an attempt to redirect users to phishing sites or download further malicious content.

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
  • 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.
  • 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://maypoin.ru/123?utm_term=the+invisible+string+pdf PDF link annotation
    • https://cdn.sqhk.co/jamolipa/R1lQjib/great_falls_farmers_market.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/67907862931.pdfIn PDF document text
    • https://sanepawoja.weebly.com/uploads/1/3/4/5/134579143/6c0e83cc4b65943.pdfIn PDF document text
    • https://dafubadam.weebly.com/uploads/1/3/0/8/130874240/zisajex.pdfIn PDF document text
    • https://cdn.sqhk.co/xafiguzi/egjUh6t/mabofiraf.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/abdominal_aorta_ultrasound_report_sample.pdfIn PDF document text
    • https://cdn.sqhk.co/pumevigatare/HhiggW8/mustang_cobra_iphone_wallpaper.pdfIn PDF document text
    • https://cdn.sqhk.co/mibemofega/gchgicD/batidobetatovaxaravex.pdfIn PDF document text
    • https://cdn.sqhk.co/goworonol/89yqGAy/29178669124.pdfIn PDF document text
    • https://cdn.sqhk.co/geroterunetu/fibdihE/vazigim.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/wodasiwotiwabovagufax.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/excel_indirect_function_from_another_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/bozogekeji/kUhigd0/42374052979.pdfIn PDF document text
    • https://cdn.sqhk.co/tefaxobaf/gcgjjio/40589699224.pdfIn PDF document text
    • https://cdn.sqhk.co/moxibusas/hDiaKhj/toolbox_talks_construction_industry.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/zopixusewulepid.pdfIn PDF document text
    • https://cdn.sqhk.co/ronofumito/hphbhfG/running_on_empty_food_review.pdfIn PDF document text
    • https://cdn.sqhk.co/kobewudojuvo/jbSifje/the_trip_to_greece_netflix_uk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC73 5244 bytes
SHA-256: ea6722715c01bbe72ea87ff0e26c43f57447d3cdc5a55da6104945cb5d7f8138
font_01_sfnt_off0000de43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE43 10424 bytes
SHA-256: b3a9b39bb81350b5109e5002a14a6c732dfa1b4866bad23adc79e703a54e694f
font_02_sfnt_off00010209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10209 16036 bytes
SHA-256: ffcc099cb313ee7442755751e66ee5b466d1c2ae3a5aa4db1c7e493352985176