Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ed7b2ac06e05d3c…

MALICIOUS

PDF

85.6 KB Created: 2021-07-18 08:06:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6648ecdedf09a4c4f58cd2e0c3613e1b SHA-1: daed2bfcd07484e1bed96ba73cce04124f4c65a0 SHA-256: 5ed7b2ac06e05d3c2490701810ee72f2672bac9e2a5b07b6b5b3fd2bba9c40e6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating it likely serves as a phishing or malware distribution lure. The embedded JavaScript and the presence of numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggest an attempt to redirect users to malicious sites. The document body is heavily obfuscated and unreadable, providing no direct content clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://alpha-cp.com/userfiles/file/zojunadexazuxip.pdf
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609040a03e36e---xajolaxozufego.pdf
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/30976d744c98ff3423efe439021b3112/34857551283.pdf
    • http://www.christianhouseshare.com.au/ckfinder/userfiles/files/57018424719.pdf
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/fc5fc2d7ab713a0b64dc26654e3b91df/nulifukojosejigu.pdf
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/903527bf2bd5df05c6378fd51334295e/38881052919.pdf
    • http://sharon-barron.com/userfiles/files/wezozozalogozidutalab.pdf
    • http://www.agenbenangbandung.net/file/letuzidep.pdf
    • http://narcisse.sk/editor_uploads/files/notokobomove.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160874fe9c3046---12246012350.pdf
    • http://zechnerbau.at/images/content/files/samamopanizewaxutotir.pdf
    • https://imad0c0.com/js/ckfinder/userfiles/files/vofume.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/a934a6e914814daf5c0ee94dbe9179ad/kuxibakoruwozebofe.pdf
    • http://ipmarketing.net/userfiles/file/70033549197.pdf
    • https://lotteppta.com/beta/assets/file/kevalotodorixezatominowi.pdf
    • http://vivo-mebel.ru/upload/file/94346110885.pdf
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b7056413bf8---88064354311.pdf
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608707fcb809a---58424912723.pdf
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c1adaa9edc---zovapolatenajotobo.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160774de09f5ad---44229120778.pdf
    • http://palletgoanloi.com/img-dn/files/1489613272.pdf
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b97378152---18408120522.pdf
    • https://an-professional.ru/img/files/file/kuwitakasinasazudekonoxis.pdf
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1485c7d21---53175633571.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=standing+core+excercises
    • 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_off0000ed4e.bin
af604c09e1a0475ce90605f54ea5206ae91c2b69a4f4a8f51def3c55908e1542
pdf-font-stream PDF embedded font (sfnt) at offset 0xED4E 17020 bytes
font_01_sfnt_off00011915.bin
d9c58d9751be69a3be138003fa4981abe9ecb76df973eeb5bf0ac71a5ecb0217
pdf-font-stream PDF embedded font (sfnt) at offset 0x11915 10676 bytes
font_02_sfnt_off0001317a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1317A 16792 bytes