Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ecad4a9601561f7…

MALICIOUS

PDF

83.3 KB Created: 2021-09-06 05:15:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0b01555fa13c6014678876e0f9af10d6 SHA-1: a2d42ae3841820d5b8bd594617f15ac1fa040ea4 SHA-256: 2ecad4a9601561f70a3ffe0765ad5dae29f0f10114410e3a16525f0db4c237af
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://jp-photo.cz/soubory/files/lukuvewesitefa.pdf In PDF document text
    • http://sity-luxe.ru/userfiles/file/85938212507.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16105a9232ec22---69517010478.pdfIn PDF document text
    • https://renesens21.com/ressources/upload/files/tupisagaloz.pdfIn PDF document text
    • http://dakdekkersindex.nl/images/uploads/89296468187.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/f1d3a9db6cbe2782100410b2c9615a17/zenenaluko.pdfIn PDF document text
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/a344f418732c698e47d8328aad794153/lumuvowu.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/ljsns79fuo4ei9j5j4t6lkctt1/zilera.pdfIn PDF document text
    • http://petraifevronii.ru/ckfinder/userfiles/files/xukukes.pdfIn PDF document text
    • http://ilyxrace.com/userfiles/files/vifejageker.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160f0e948adabc---noxumogowu.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/h05run11h621r1lnruo6tif6sc/gofavovenixo.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/n01tccmlfq3eqfoj9djcu67329/82122930036.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608088a1bf686---5877573482.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/16098c02550d0f---34610046212.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1610d8d84c87d5---bakakojupasimevatori.pdfIn PDF document text
    • http://studiomalpocher.it/userfiles/files/5035278862.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/zivoniroliba.pdfIn PDF document text
    • http://hockeydh.com/files/ups/files/favifegud.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16096dab1b9792---3629627717.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/logukomogakowatikalov.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/85106045620.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/6htpcg01jqe6jc0qhag6rdeug2/fasotuwekozaxawiwiti.pdfIn PDF document text
    • https://firsatoyun.com/calisma2/files/uploads/wazef.pdfIn PDF document text
    • http://quangcaosms.org/media/ftp/file/33380976812.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=converter+pdf+em+word+androidPDF link annotation
    • 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_off0000d8c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C9 20832 bytes
SHA-256: 7e867a2839de65f286264a344530a1db926260f1b8c443c6e1d4307f9331e6a7
font_01_sfnt_off00010f24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F24 10628 bytes
SHA-256: e461d050393de0c3b07beb622258f2ef26c78b4f5dfd49d4e1146bbed2f16323
font_02_sfnt_off00012789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12789 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1