Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aaef1a7aaa9eb79…

MALICIOUS

PDF

72.0 KB Created: 2021-09-04 05:33:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c73dad845bd3a2f3c26a6c2318a4f23c SHA-1: ee2e205a857539b45cb33634a9132a3a932415b6 SHA-256: 5aaef1a7aaa9eb79bc86993cb6af3bc00a8335e70f80cad28310dab59788076c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous external URLs, many hosted on compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The PDF structure and embedded URLs indicate an attempt to exploit users by directing them to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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
  • 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 https://garglob.ru/uplcv?utm_term=numeros+naturales+primaria+pdf PDF link annotation
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da8690b033b---dipolo.pdfIn PDF document text
    • https://cissud.eu/uploads/ck_editor/files/8241008352.pdfIn PDF document text
    • https://htapigroup3.com/contents//files/xekivuridipokixufusepofu.pdfIn PDF document text
    • http://dochoiotovn.com/uploads/userfiles/file/52267441797.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/16070fd9d660d1---13651462425.pdfIn PDF document text
    • https://beyondpins.com/calisma2/files/uploads/91962322177.pdfIn PDF document text
    • https://bhandarisurgical.com/ckfinder/userfiles/files/fujekimirit.pdfIn PDF document text
    • https://ryokanclub.com/FileData/ckfinder/files/20210829_1E0A25877BA6CFBB.pdfIn PDF document text
    • http://koopmankennedyfeller.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/39181691967.pdfIn PDF document text
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/e1249a0f8e839e77b5bb7fdf59a62b1d/89067685383.pdfIn PDF document text
    • https://protrialse.eu/files/files/lujetezixogukar.pdfIn PDF document text
    • http://raffaelecavazzoni.com/userfiles/files/nikufiwisa.pdfIn PDF document text
    • http://henghuitong.com/jingkelun/userfiles/files/20210624081545.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160a773e5669c0---47351702877.pdfIn PDF document text
    • https://actorconseil.com/files/file/60140161340.pdfIn PDF document text
    • http://csc021.com/userfiles/file/20210801115952_x58koz.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/kuwonosifunikalanodad.pdfIn PDF document text
    • http://webhenevents.com/clients/868374/File/lirapo.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/51e7d39f9ada62ce7ebc8dd126551817/sojese.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a890bb0b193---juvedimoroxerute.pdfIn PDF document text
    • https://ottenburger.com/userfiles/file/kikuxesorogiwuw.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/0eilik1meevriff0untpuv0od7/waxovigovabul.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/ledefeba.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/eqjvjj4t8en67vfutc7nl3hak2/43247246568.pdfIn PDF document text
    • http://emrc.ie/upload/imagecontent/file/livatobowolugixoxaf.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b908.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB908 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d11f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD11F 10736 bytes
SHA-256: 230ed980d176c93c564d77cf3c7fdbfea419665c85867b77c0d6a325c5740953
font_02_sfnt_off0000e9bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BF 16320 bytes
SHA-256: a9eb3109f5b45d7673c5e654a5e15cf06fbca515cfb60358b8724f1a391db712

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