Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ee2a4861418a206…

MALICIOUS

PDF

70.0 KB Created: 2021-09-24 21:06:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6ebdcda2613972666ecc66a724a2c89e SHA-1: d7f13a039b29f9fd7f1dd7550c0d6890be039ee2 SHA-256: 4ee2a4861418a206f6c2062a7d8a050cf3294edf48d241401361dc08746b95fe
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript, a common technique for exploiting PDF viewers and initiating malicious actions. The heuristics indicate it functions as a link farm, directing users to multiple external URLs, some hosted on compromised WordPress sites. This suggests the primary purpose is to redirect users to malicious content, likely phishing pages or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://alhurwallpaper.com/Files/files/1750926638.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614acb3980bf8---53446973324.pdf
    • http://wpklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fevivivugom.pdf
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/cda6a4520388c4d93b84935afc7e01fb/xubesurifabumipafitizowe.pdf
    • https://fier-forjat-valimet.ro/ckfinder/userfiles/files/32934220592.pdf
    • http://paraglider24.de/pics/fotos/1/file/zobabalegomubo.pdf
    • http://vstarmp.cn/upload/files/20210920_213152.pdf
    • https://concurs-euclid.ro/upload/fck/samotomaves.pdf
    • http://heldermusic.nl/ckfinder/userfiles/files/xifopexokosazu.pdf
    • http://escritacontabilidade.net/fotos/news/file/63876639203.pdf
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161408c3844c8e---50836422997.pdf
    • http://mpwlawpa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zolividevixokomoke.pdf
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/1316ed0dfacdcd17964ccd7f8aefbd74/zawetoponuzexiwe.pdf
    • http://njxinbell.com/upload/files/wumutopupilulasazelenov.pdf
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f788f21aea---fepaxosakes.pdf
    • https://www.cylinder96.ru/admin/ckfinder/userfiles/files/81643350809.pdf
    • http://zssadkowice.pl/pliki/32640593933.pdf
    • https://www.bankkartya.hu/js/ckfinder/userfiles/files/fujinofepilagosibasaj.pdf
    • https://yukkumpulgroup1.com/contents/files/79247326030.pdf
    • http://youil.org/userData/board/file/jukejidodezupejaveduwike.pdf
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/161419ba9740f4---59047046712.pdf
    • http://fioredda.com/userfiles/files/3451105499.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=archery+master+3d
    • http://crossfit28.com.s125853.gridserver.com/siteuploads/editorimg/file/medibudugufudokewavuxuki.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_off0000b2fb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xB2FB 16792 bytes
font_01_sfnt_off0000cb0d.bin
020cc87c0b649f6c45619a4cc4a9368f802124ba03f742af1fe5f364a9a5479a
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB0D 15532 bytes
font_02_sfnt_off0000f253.bin
df51ea9c299c8987e553ae41fb612aabeec5deeb2b092836de7a79b765c40344
pdf-font-stream PDF embedded font (sfnt) at offset 0xF253 10540 bytes