Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb7f290c7879ab26…

MALICIOUS

PDF

97.4 KB Created: 2021-06-28 23:16:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a328debea86552ef3553e5bf87075f97 SHA-1: acf96c161af3b2996066cf3cb886cb2318693efe SHA-256: fb7f290c7879ab267442bc6b2d40e45198b0828c0fbe71ca8edc449a42e8e091
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'SE_REMOTE_SUPPORT_LURE' indicates the document's content likely instructs the user to install or connect with a remote-support tool. While no scripts were directly extracted, the presence of numerous links to potentially compromised websites suggests a phishing or credential harvesting attempt, possibly leading to the download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9806

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
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://spy-military-labs.com/userfiles/file/56543636263.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/4160f53b04f9a0f1c3339d2e8722b251/ridamaxinu.pdf
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c74d6a2425f---fifodoxuwagibijebale.pdf
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/8u99bfmneafagjolc46i0fv977/17997933663.pdf
    • http://lookkorea.net/userfiles/file/21157372621.pdf
    • http://ekachaiguitarist.com/ckfinder/userfiles/files/11936188780.pdf
    • http://jaatkinson.com/userimages/pitejip.pdf
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a253f35ceb9---posufox.pdf
    • https://netiko.ge/img/Data/file/xoridawado.pdf
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/cpnmg2f613ar8f4b7ctsg05epv/zupudejulabepelogumagem.pdf
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c940f120186---solubelalakuvomopovi.pdf
    • http://ibtaker.ps/userfiles/file/rifukiw.pdf
    • https://xn--80aaijzh9b.xn--90ae/documents/file/zakafoneba.pdf
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3235e6d4eaf5dc6df859f8ecdd0bef0d/xozuwodegivinosojuvugi.pdf
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/pcrjlt8t3k2c3kag3hmm3n18hd/57610965655.pdf
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/78062a49aceaeb7d57763e1f5c7eb938/87373374611.pdf
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/ffa2ddf8aa2983cbd0894f544b0f8107/86167008524.pdf
    • http://beastyenergy.com/userfiles/file/27677015104.pdf
    • http://dungcubepgiangtrinh.com/webroot/img/files/21133623834.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/wikokes.pdf
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a07c806f80---keremanomagidomaregamexi.pdf
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086a2db6fb6f---wuzon.pdf
    • http://cesmclassof68cheyennewy.com/clients/82478/File/jafaxemogo.pdf
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160898e0084a6a---88277677742.pdf
    • https://red-adlay.com/upload/files/70183000529.pdf
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbf3782815---fojuwasipegugapulofo.pdf
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/ca3127618508d30085b88fe154d838de/13366820827.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=paper+defects+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_off00011ccb.bin
3ddf285c1ed0566ceb491145b988a9873eb1af6295d7a704f1289b73097a91bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11CCB 16916 bytes
font_01_sfnt_off00014913.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14913 16792 bytes
font_02_sfnt_off0001612a.bin
92a117a83d8f6590a678e3457c3c8a03713e2bf3934a34ce5c580d4573026df2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1612A 10252 bytes

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