Malicious PDF — malware analysis report

Static analysis result for SHA-256 02f5bb3fa3032189…

MALICIOUS

PDF

88.7 KB Created: 2021-06-27 01:24:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0723fdfd5d94d79e6e2d15ebf38f9f6c SHA-1: 13014c47fffc4030bb225d06f7bda6b4435437db SHA-256: 02f5bb3fa30321892e9cc946af7b06e7eb1651480fd2b8fd7905f2deb0b49bb6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress upload storage locations and other potentially malicious sites. The presence of external URIs and link farms suggests an attempt to distribute further malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • 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.
  • 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://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072701c3c0d7---6197614080.pdf
    • http://absolutelyneon.com/userfiles/file/83569189867.pdf
    • https://ngoctraithaibinhduong.com/uploads/news_file/50661545716.pdf
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160b7f8671b4dd---fujerufamitubumugawusu.pdf
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/25cb2bbe9a81c3b71edb32f2edce1eaf/magodolufaziginomofel.pdf
    • https://najlepsze-w-polsce.pl/uploads/62536745919.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a95641acde5---86018590516.pdf
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e7cbc897a---fijafufeluf.pdf
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7cb709060---buwimifatewugudinukibe.pdf
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/ffa4e6da72be0d14e7aeb2c7230adc4b/jubisiwelinotoper.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1210212a1---24852876912.pdf
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/fba062ee2968ed90ffe6974112617eca/xibixepifidomidi.pdf
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/ob40gbmjj78pujh0qv8fpvec1j/39066710793.pdf
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a48ac3bafe2---vetedalurubumevapep.pdf
    • http://ghalemdi.com/userfiles/file/mowuxumodotofox.pdf
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afcff86ec6f---93424314688.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f94515292---sebudebokunoxar.pdf
    • http://fullcolorspandoeken.nl/userfiles/file/kudazigazizadaji.pdf
    • http://taiwanglassgroup.cn/userfiles/file/nuzugiwuwejizirig.pdf
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/4cb8ba2a135a8492cef3815296866841/12443771129.pdf
    • http://kfbi.ru/content/file/10522094206.pdf
    • http://imbirimbir.ru/files/jokigugolexelaxisanij.pdf
    • http://raffaelecavazzoni.com/userfiles/files/ginoxaraxiwenatajezod.pdf
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/e0d75cb9c534834006723cd581c290e1/80097032785.pdf
    • https://bouwservicewinthagen.nl/userfiles/image/file/sutefusupalofakejavomiren.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=english+for+construction+workers+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_off0000f56e.bin
0af3328446f841575cad0fc83a15c230ea19f1ff59749946152b10b2c567b8fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF56E 11000 bytes
font_01_sfnt_off00010ec3.bin
fda45bbe8c2b6faf02551dd02e2528429af84ce1c08d53532f07b66858c3e6d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC3 17640 bytes
font_02_sfnt_off00013d25.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13D25 16792 bytes

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