Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc75f03334be9c75…

MALICIOUS

PDF

97.1 KB Created: 2021-04-03 14:29:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7e7aa45123c68bd491b4fadf8832deb8 SHA-1: d4b7c3f11e23a7bae81f8f306f744d0940907de3 SHA-256: fc75f03334be9c75511be0da24fb4daa978f2b5e4092f9d4dff11a3f3feec83a
254 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple embedded URLs pointing to redirectors and SEO link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, contains references to programming languages and wkhtmltopdf, likely as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/award?keyword=computer+programming+languages+pdf In PDF document text
    • http://1cats.space/macbeth_act_4_scene_1_study_guide_answersxd09l.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/pemezerutijopidonadifeb.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/beeswax_candle_making_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/fimipafuzelewotugux.pdfIn PDF document text
    • http://afracheat6.xyz/ejemplos_de_actas_de_reunion_de_trabajoygtaf.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/life_after_death_christianity.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/41709314300.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/sweat_play_by_lynn_nottage.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/labubevidufopogebit.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/ebay_android_app_no_notifications.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/all_physics_formulas_of_class_9_and_10.pdfIn PDF document text
    • http://1xbet-registr.site/6360510884xtb6j.pdfIn PDF document text
    • http://trylait.pro/nasb_vs_nkjv6kyai.pdfIn PDF document text
    • https://s3.amazonaws.com/sobaketemu/technivorm_moccamaster_sale_canada.pdfIn PDF document text
    • http://kamini33.ru/ronipu3f69s.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dc688580-c0ec-4ade-910b-7abffd870ab4.filesusr.com/ugd/096b61_61be4984af214465a1e8d0fdbf5f531d.pdf?index=trueIn PDF document text
    • https://f33d1b56-f518-462b-b61f-c1b5c1ba661c.filesusr.com/ugd/1c44ce_45452360b0b44356bb3bc035818ce498.pdf?index=trueIn PDF document text
    • https://58fabbca-0322-4868-a582-948aa19840f9.filesusr.com/ugd/93748c_5c73921460c14fef8237405b34d474b4.pdf?index=trueIn PDF document text
    • https://f635e5d9-31b1-4f19-b758-7a623be10181.filesusr.com/ugd/6cf0f5_ad7cde6057b14e18a1520c6334468331.pdf?index=trueIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11965 4016 bytes
SHA-256: 7278ed2924031f7cb48accbee7c336b7b30468630b79de79cd3589013bd2d2c1
font_01_sfnt_off00012791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12791 5268 bytes
SHA-256: 74f1c1f7eddc462154d556cc5f84d255f394afd633442894b4f3088b9b69ca80
font_02_sfnt_off00013960.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13960 11612 bytes
SHA-256: 41a1724ff9e83b4916e658f31dacf348ccd9432222dd23f1213f375750597e09
font_03_sfnt_off0001615f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1615F 16164 bytes
SHA-256: f469c5aa689aa4c1965481b78cfaebbf1c3ebdad2306c7067134b7b4aaa0addd