Malicious PDF — malware analysis report

Static analysis result for SHA-256 128e50a130a00038…

MALICIOUS

PDF

80.0 KB Created: 2021-02-09 02:05:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 123b09bbcd1901a68989f5734ddcb00b SHA-1: 3bec5e85a194ab97d9cf133b686b548b34097048 SHA-256: 128e50a130a000382863b5efae0f57ea7d630cd454da0b25e0f1261ac791feec
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, many of which are part of an SEO link farm, suggesting a phishing or malware distribution scheme. The presence of a UTM-tagged redirector URL indicates an attempt to track user engagement with the lure. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to deliver malicious content or redirect users to phishing sites.

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
  • 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://druttle.ru/123?utm_term=pelisplus+tv+apk PDF link annotation
    • http://golden-bridge.pro/67967082963np7ux.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474176/normal_5fec2ff4a1e26.pdfIn PDF document text
    • https://tadonajates.weebly.com/uploads/1/3/4/3/134319020/nudedinera_gelon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421474/normal_6004a91a2618f.pdfIn PDF document text
    • http://mrshadow.net/anker_powercore_slim_10000_instructionsg6ocr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405443/normal_5ff289b392ccf.pdfIn PDF document text
    • https://cdn.sqhk.co/sabepakofo/ha4w8TQ/nasa_bbc_news_live_today.pdfIn PDF document text
    • http://sushibara.net/engineering_mechanics_statics_14th_edition7gxja.pdfIn PDF document text
    • https://bakadowo.weebly.com/uploads/1/3/1/3/131380427/ninaboda_wokiwanupimib.pdfIn PDF document text
    • https://cdn.sqhk.co/lupokuna/ajbioEe/the_hindu_business_line_epaper.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485569/normal_5fcc488198f58.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496378/normal_6003425eb53e0.pdfIn PDF document text
    • https://cdn.sqhk.co/fetedudi/NThfjgV/lemonade_stand_sign_free_printable.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460708/normal_5ff30c768ce8d.pdfIn PDF document text
    • https://cdn.sqhk.co/doboketuzoj/jhbasij/cats_crash_arena_turbo_stars_apk_uptodown.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384318/normal_5fd775eaa8350.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/ruzumeb/nios_case_study_format_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/47819951985.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/gexuxelagikujizenamefi.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/pikasejesopisir.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/melovuxedo.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_off0000fc66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC66 4844 bytes
SHA-256: 70d70010b5d2fd2a0d229712e30efe344efbb1efc52205a52fc337f3116c100a
font_01_sfnt_off00010cfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CFD 11060 bytes
SHA-256: 2c8818bb785d279158838552f6afe0e5b607c2208d0eedc5c21e2e358a9e90be

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