Malicious PDF — malware analysis report

Static analysis result for SHA-256 78bbaa5acacb0ed7…

MALICIOUS

PDF

74.5 KB Created: 2021-02-26 16:47:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 465041ca1f5b58fa820332c337f1a811 SHA-1: f73bec819a9f7243e9327516cc0f83a1637ab439 SHA-256: 78bbaa5acacb0ed7bb8c81840d26b4a2137fc8af98ef933b02d827159873b7c7
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are SEO-optimized and point to redirectors, indicating a link farm or phishing attempt. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_UTM_REDIRECTOR_LINK' strongly suggest this malicious intent. The presence of an embedded URL and the ClamAV detection further support the classification as malicious, likely a phishing lure or a downloader for further stages.

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://ponafet.ru/strik?utm_term=how+much+does+it+cost+to+install+a+heat+exchanger PDF link annotation
    • https://cdn.sqhk.co/tovitaxani/gcaxNje/jepokujaganirawedifiziloj.pdfIn PDF document text
    • https://pisusafinado.weebly.com/uploads/1/3/4/3/134363103/7709273.pdfIn PDF document text
    • https://cdn.sqhk.co/gixedomawa/uhheKhe/cast_of_the_movie_loopers.pdfIn PDF document text
    • https://rulakufip.weebly.com/uploads/1/3/4/4/134489053/kosajiragav_tupevewijule.pdfIn PDF document text
    • https://cdn.sqhk.co/vagizabibo/hje1jfw/gobakitewafavaluvopaw.pdfIn PDF document text
    • https://cdn.sqhk.co/pujalabasi/hyge5PC/idle_planet_destroyer_galaxy_space_shooter.pdfIn PDF document text
    • https://cdn.sqhk.co/purorenutuw/e9jeoye/37769967102.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/sakaburepagase/bbc_newsnight_reporters.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/chupke_se_koi_aayega_mp4_song.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/53172444844.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/fulesixuwiselimeguma.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/android_box_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/first_birthday_chalkboard_poster_template.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/how_much_is_omnisphere.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/digirarinedew.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/eastern_lake_ontario_fishing_report.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE637 5472 bytes
SHA-256: a6dd47f8fe9cc246f9db761c8a97419beac675ba95890ab00cd6337456cbb541
font_01_sfnt_off0000f8bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BC 10512 bytes
SHA-256: eabb9e071ced3586cbbbfb5d37cc3c0a98a79db4d0cf03c83cabe6485afcb08b

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