Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e982fcc3de5a679…

MALICIOUS

PDF

69.1 KB Created: 2021-09-20 10:08:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5f467ba45e14e9efdbe81bf7ba17f03f SHA-1: 0a12bf4d4a787ae081832cfb00a651a6bf007d43 SHA-256: 9e982fcc3de5a679fbe0d4d622ab70f817b64954c11980799ace8eb590ae1095
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains an embedded JavaScript stream and a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. The document's structure and content indicate it's designed to trick users into clicking external links, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://oniceh.ru/uplcv?utm_term=bit+torrentz2+download+for+android
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/8d5088a8930bd54b6893edc45c88b31f/89192555524.pdf
    • https://loyallcanada.net/editor_files/file/40989358732.pdf
    • http://cuathepvangohaiduong.com/images/ckeditor/files/pomagewujetoruzupeki.pdf
    • http://aviapartner.biz/js/ckfinder/userfiles/files/27482076655.pdf
    • http://tipkeo.com/js/ckfinder/userfiles/files/91890988089.pdf
    • http://dui-antidote.com/images/userfiles/file/lolotav.pdf
    • http://cegled.varosom.hu/userfiles/files/5005105912.pdf
    • http://hutnia.pl/userfiles/file/79373717566.pdf
    • https://megalightgroup.lv/uploads/files/40216745851.pdf
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/26087is62lqo3qa3oqigodkb23/75604565405.pdf
    • https://elperrocallejero.info/ckfinder/files/92839151141.pdf
    • http://jsdarvin.com/files/15210019888.pdf
    • https://locktactyuma.com/ckfinder/userfiles/files/tebakamidunurajulavagow.pdf
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/161467d7a8f6ce---vifavokedugomedirudax.pdf
    • https://prtl.pl/userfiles/file/20411103535.pdf
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/04121e696bd185f24dc66d404663dac3/tuxemeromiwezejodumupij.pdf
    • http://contua.org/userfiles/file/32148675988.pdf
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133259032dc1---jipowoxibajikixenelo.pdf
    • http://englandmatchshirts.com/assets/file/49502168448.pdf
    • https://tenfci.org/userfiles/file/79902679008.pdf
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147b4b14f68f---borisowogewuvikuxonuruxem.pdf
    • https://vadihosting.com/calisma2/files/uploads/kelejigumuniligilu.pdf
    • https://decisionstogo.com/fck_image/file/budaxetusupa.pdf
    • http://aallergy.friend-match.com/upload/files/45465932310.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_off0000b358.bin
74d59c97ebbd5f329e478ca76f3147bd3a1b30362b6d3acc4b6fb7c1e3cb55d1
pdf-font-stream PDF embedded font (sfnt) at offset 0xB358 10500 bytes
font_01_sfnt_off0000cb85.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB85 16792 bytes
font_02_sfnt_off0000e397.bin
b4eb67fad267a1825f21fa1ee6afd95d3edd81745af837d1ac27a21e74daa10b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE397 14204 bytes