Malicious PDF — malware analysis report

Static analysis result for SHA-256 e858ace3a17a9e6a…

MALICIOUS

PDF

81.3 KB Created: 2021-05-19 23:18:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a69f33b75e7d33fa64f62213f31ec4a9 SHA-1: b6de06e5cc38c0263689601b4d961f53e06fdeda SHA-256: e858ace3a17a9e6ae437a42f37e434dcaae11196f26e874688bd4438c55ddc4e
196 Risk Score

Malware Insights

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

The PDF file was identified as malicious by multiple heuristics, including ClamAV and an ML classifier. It contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm designed to manipulate search engine results. One prominent URL, 'https://jottigo.ru/strik?utm_term=how+to+print+from+iphone+to+canon+selphy+cp1300', appears to be an SEO redirector, likely used for phishing or distributing further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jottigo.ru/strik?utm_term=how+to+print+from+iphone+to+canon+selphy+cp1300 PDF link annotation
    • https://banijeweziwi.weebly.com/uploads/1/3/4/8/134873891/9099036.pdfIn PDF document text
    • https://pakajifovajopif.weebly.com/uploads/1/3/1/6/131607230/e52f7d17.pdfIn PDF document text
    • https://dorijalasenotom.weebly.com/uploads/1/3/5/3/135327318/8231197.pdfIn PDF document text
    • https://sajadarazaga.weebly.com/uploads/1/3/4/3/134340855/gosewemame.pdfIn PDF document text
    • https://mefupajudeto.weebly.com/uploads/1/3/4/8/134883840/tuwuzividekip-fosezejabilab-liximu-mapinonan.pdfIn PDF document text
    • https://nudegono.weebly.com/uploads/1/3/4/6/134682657/panirugago-nebufajuvix-mapafowoja.pdfIn PDF document text
    • https://zazoveju.weebly.com/uploads/1/3/1/4/131407355/30efd4baeab.pdfIn PDF document text
    • https://wadagoxegoti.weebly.com/uploads/1/3/4/3/134385229/famasomosevif-zegako.pdfIn PDF document text
    • https://lanoxujuzon.weebly.com/uploads/1/3/4/6/134630121/wobivaposixelolakaw.pdfIn PDF document text
    • https://tigakivukabor.weebly.com/uploads/1/3/1/1/131164093/ledosukawajezeluvap.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/dowavelaxam/gejusawape.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/376463d6-24e2-45de-8fc0-178744bb6a5c/serusanopekiruzeso.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/48279674765.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/30771058516.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3607bcd-5388-46bb-9e07-96a662b34062/batufogojuxomodevuzu.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/58380407139.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/how_do_you_buy_penny_stocks_on_etrade.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/18147433294.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/443ef3d2-be9d-487c-8ee9-07f9e3ea6416/star_wars_-_dd_5th_edition_conversion_download.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/gutujigogetelefadij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7bba8b8-367a-48e4-a2c0-89fd517f3828/marco_36_fireplace_doors.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fa92a0f-e240-4c5c-8fc1-9f2f7a414bfb/maze_runner_4_full_movie_subtitle_indonesia.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC4 2828 bytes
SHA-256: 5fccc4b93669808a911be510fa35354615011d06cae0a9a774c0ef2e9a75b465
font_01_sfnt_off0000f9ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CE 5768 bytes
SHA-256: 6788e612b7e2191d042eb6c5cee20317d0877d997a2c6f8b50e46fc362da04b0
font_02_sfnt_off00010d64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D64 11664 bytes
SHA-256: 1bc7af5a2b19f0582626dc7848b2cab537503316479af91b82a3e106e5dabd84