Malicious PDF — malware analysis report

Static analysis result for SHA-256 897d3ee93f913515…

MALICIOUS

PDF

74.4 KB Created: 2021-09-25 05:31:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2be972ba806e75124eeecb5ec68bd0d8 SHA-1: 1e3d1f9f2c0d7232a23ef2a1fc1eabb9f89a2469 SHA-256: 897d3ee93f9135151a7809183798685a9ca068199db4d1039595fe103f765452
134 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external URIs, indicating it is designed to redirect users to malicious content. The presence of a link with a "utm_term" parameter suggesting a "net speed booster for android" points towards a social engineering lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to deliver a secondary payload or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pixomot.ru/uplcv?utm_term=net+speed+booster+for+android
    • http://nhagiatxanh.com/public/default/ckeditor/files/mesiwa.pdf
    • https://jurad.eu/files/file/tebivesatebigixekuj.pdf
    • http://tgtech-auto.com/userfiles/file/xilerumazegefilodubodej.pdf
    • https://keluargamimpi2.com/contents/files/11330897674.pdf
    • https://togelunited4d.com/contents/files/90227883154.pdf
    • http://kondicionery-himki.ru/upload_picture/file/46508912009.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f6b0040659---95883298207.pdf
    • http://akekaluck.com/ckfinder/userfiles/files/65479925196.pdf
    • https://dragonexpressml.com/userfiles/files/lewuwogovipuzekoma.pdf
    • http://illinoislivestock.org/userfiles/file/45339318173.pdf
    • http://7profi.net/userfiles/file/jurikibupodomoxa.pdf
    • http://www.tobywells.org/media/fckdir/file/votifilaxonaganovazen.pdf
    • https://cesiedizioni.com/userfiles/file/28895330733.pdf
    • https://birgatour.mn/js/ckfinder/userfiles/files/bivagopeguxuk.pdf
    • https://paymentor.nl/uploads/file/87725721597.pdf
    • http://theponghop.com/upload/files/78253621113.pdf
    • https://anmoul.com/userfiles/file/13420669997.pdf
    • http://coomargroup.com/ckfinder/userfiles/files/23224878377.pdf
    • http://yuc-fac.com/uploadfiles/20210921061502.pdf
    • http://greenlivinggarden.com/htdocs/UserFiles/file/koxelegimitogawewolude.pdf
    • https://www.auto-ecole-rive-droite.fr/ckfinder/userfiles/files/wesolugojumimegigewux.pdf
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/bd217db258871d33a8b11cced45c54a2/lugijivoga.pdf
    • https://alienaquatics.com/home/gb/public_html/ckfinder/userfiles/files/nivosanozudos.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba40.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA40 16792 bytes
font_01_sfnt_off0000d252.bin
f23682813c1261070774b3659c0f52ba1adce45b7e5058d475ea8a5ad6667239		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD252 18684 bytes
font_02_sfnt_off00010257.bin
33680204c0481d80172a36f1f1a02247af4970ade010126bd87782c6132fa553		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10257 10560 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.