Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b1614e5933878d6…

MALICIOUS

PDF

82.1 KB Created: 2021-03-17 07:49:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 18d115b47cbda6c1549d7d3e717eccf5 SHA-1: 75c8b390d22263200d750ca5a1549e005daebf91 SHA-256: 7b1614e5933878d66480a51cabf54e3197f1a3a68076bdeaebe5b8010f321e3f
196 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to Weebly and AWS S3 domains, which are often used for hosting malicious content. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_UTM_REDIRECTOR_LINK' indicate a large number of links designed to redirect users, with a specific lure for 'download apk twrp recovery'. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/wix?keyword=download+apk+twrp+recovery PDF link annotation
    • https://gedorizifoxe.weebly.com/uploads/1/3/1/6/131607240/soxexixemup.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/mtd_tiller_replacement_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/xijuveretu.pdfIn PDF document text
    • https://kokilanoru.weebly.com/uploads/1/3/4/0/134012510/kiwiza.pdfIn PDF document text
    • https://sunarikibuniteg.weebly.com/uploads/1/3/1/3/131381519/bojazonevakeviwaj.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/learn_korean_book.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/subscribe_png_photo.pdfIn PDF document text
    • https://wonozonozosog.weebly.com/uploads/1/3/1/3/131398184/adb9371ae9a45.pdfIn PDF document text
    • https://sujadomas.weebly.com/uploads/1/3/4/5/134526010/970720.pdfIn PDF document text
    • https://fuwosijeven.weebly.com/uploads/1/3/0/7/130738701/nedebinonison.pdfIn PDF document text
    • https://s3.amazonaws.com/dikomavomem/bsn_ortho_glass_splinting_manual.pdfIn PDF document text
    • https://bofeliwibetu.weebly.com/uploads/1/3/2/8/132814086/6c5c05439.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/spider_man_ps4_dlc_trophy_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/jexotufigenobi.pdfIn PDF document text
    • https://bodonoweti.weebly.com/uploads/1/3/1/8/131856710/2247652.pdfIn PDF document text
    • https://ganivakolijovi.weebly.com/uploads/1/3/4/6/134666525/8b27cc.pdfIn PDF document text
    • https://duxoberadu.weebly.com/uploads/1/3/4/7/134718286/runolenedejimune.pdfIn PDF document text
    • https://fuzonigeli.weebly.com/uploads/1/3/0/8/130813785/ditexefolijure.pdfIn PDF document text
    • https://tanuroxej.weebly.com/uploads/1/3/4/1/134131309/ramokunifezu_kururalikaler_wugidesukedorez_saxexupireb.pdfIn PDF document text
    • https://xiluxobafuju.weebly.com/uploads/1/3/5/3/135323992/6296211.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_off0000e422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE422 5208 bytes
SHA-256: 14ce451fbacaa1cfbc203f80c42883e912cf580ca2959a9c2e13700a293dc147
font_01_sfnt_off0000f613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF613 15400 bytes
SHA-256: d4696b847405d8b1ec42608a2007ea4083e1d37dd40214efd778fd8a30ffa57a
font_02_sfnt_off00012615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12615 16080 bytes
SHA-256: 0f592f62031d55fa1d0fb4718f5d067d1987426a283bb2ebc7a28ae7d8d4812e