Malicious PDF — malware analysis report

Static analysis result for SHA-256 b234654312d57e72…

MALICIOUS

PDF

72.3 KB Created: 2021-02-22 02:25:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 2a16713f45340c2835dc23390e0a96c1 SHA-1: cf767042a18c89956c3e11619c52c21e79ce296b SHA-256: b234654312d57e7259367b55de0871fdaf94fdb5e7d4b89056448dd2d7f3bb33
196 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a prominent one leading to an SEO redirector disguised as a manual. This technique is commonly used for phishing or to distribute further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the PDF structure and embedded URIs suggest a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://leonvi.ru/123?utm_term=amana+commercial+microwave+manual+hdc182 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4413462/normal_5fcbf65f52329.pdfIn PDF document text
    • http://vwwv-avito.online/28140651400zkw6w.pdfIn PDF document text
    • https://vematonejos.weebly.com/uploads/1/3/1/3/131383464/kasewufexapa.pdfIn PDF document text
    • https://lezojefob.weebly.com/uploads/1/3/5/3/135319065/mupelupemomum_polakusajuwolar_kibovogo_dabemivanu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417656/normal_6026a798df587.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490133/normal_5fdc14805419f.pdfIn PDF document text
    • http://copyrightprivacy.site/wikexakub2wj2.pdfIn PDF document text
    • https://mebedepubini.weebly.com/uploads/1/3/0/8/130813558/8649762.pdfIn PDF document text
    • https://cdn.sqhk.co/vonirosidejo/fgugfuF/wordpress_themes_for_fine_artists.pdfIn PDF document text
    • https://zeberafuduzugag.weebly.com/uploads/1/3/2/6/132682167/1014738.pdfIn PDF document text
    • https://cdn.sqhk.co/towevefizub/geIXkhc/ice_cream_truck_song_mp3_download.pdfIn PDF document text
    • https://cdn.sqhk.co/jepogedofuz/7jhjcyP/stack_colors_3d_tower_runner.pdfIn PDF document text
    • http://esclub.info/74732700762rqa5k.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366321/normal_5ff283673afd7.pdfIn PDF document text
    • http://prodive.su/75870429493nwg8d.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/tubukeganuji/ritixifuzola.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/prometheus_alertmanager_custom_template.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/les_cercles_de_la_forme_diderot_avis.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/laminating_sheets_office_depot.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/41501536474.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/gtb_aptitude_test_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/ninazarila/absceso_pulmonar_tratamiento.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/86364160919.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/merigegenaxebikusule.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8B3 6440 bytes
SHA-256: 3d4760ca295192c89086870ebbac49c5a5945404ea6ab57fca452cf2db5f569a
font_01_sfnt_off0000d8a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A7 5520 bytes
SHA-256: 9aaa1e75710440b3f057ac38a6f6df860c9999c96aa81c399082f7e0b111dba3
font_02_sfnt_off0000eb56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB56 11228 bytes
SHA-256: b2d3e8a115de4403dd81fd4f1c72bc1d5cd6eeb1f61d8b6ac4a6f2d72a41bd1c