Malicious PDF — malware analysis report

Static analysis result for SHA-256 92225a788e6a6ce0…

MALICIOUS

PDF

74.9 KB Created: 2021-06-28 03:34:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8555307247ad56cfdddb996a885fa27a SHA-1: c7ef051c8d327c96be3381996feb64d78fd0f49a SHA-256: 92225a788e6a6ce0af7fad721c295743ecbbf5f1cc7292bdd5dc3e0516321536
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://pellevah.com/upload/files/63474081937.pdf
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/92381538602.pdf
    • http://euredit-editions.com/userfiles/file/71777822950.pdf
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/539d8p9csonjaqkaqfehmkrhv2/75784976020.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/acfb3df22e18b9adea80a2987b343fd7/89491141764.pdf
    • http://big-blue-bus.com/pics/fotos/1/file/zagusobobanazogojiropeni.pdf
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb4f8aba28---sijatodat.pdf
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c36abcdc459---20276123516.pdf
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160b3b89f0ed01---59238964051.pdf
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7863c59e49---wudipe.pdf
    • http://zge-led.com/luodan/images/userfiles/file/wibuzekem.pdf
    • https://advantagelic.com/singhania/downloads/file/5950981494.pdf
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/16084f5368d0df---milonofime.pdf
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a429cec3dd9---8682475647.pdf
    • https://hondamienbac.vn/userfiles/file/39171209699.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/be2a676277f2691885f8bc7323bf5cc6/dupudirunorefizerupaw.pdf
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160b5be462f8e8---tatiwivaku.pdf
    • https://unserbiokorb.ch/userfiles/file/korokupuzalutejeravofu.pdf
    • http://amandatravel.com/userfiles/file/61569803831.pdf
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/fe61c2e020accc635128d6963f436ac7/92039353290.pdf
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/0qt3l0gs6gqfiv972gh32st327/verobinovedusetiwiremo.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=lung+cancer+and+shaking+hands
    • 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_off0000c204.bin
ea6efa505e6b62578cc06c52d084173e89a1d3aafa83b462c1cb72d037fd03a8
pdf-font-stream PDF embedded font (sfnt) at offset 0xC204 17140 bytes
font_01_sfnt_off0000eed8.bin
f10a2056076e5555e5921bd973152e5cfd025e42507433e8dff77f85f107b747
pdf-font-stream PDF embedded font (sfnt) at offset 0xEED8 10532 bytes
font_02_sfnt_off0001068a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1068A 16792 bytes