Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f00d7eeec2c7614…

MALICIOUS

PDF

83.2 KB Created: 2021-09-03 10:28:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8673d62d43e4fd625701d4dcdec2a67b SHA-1: a2062fa4971c97552d67882b48db257dec1918f8 SHA-256: 9f00d7eeec2c7614fd964e11d7875f55624c9e46191c0c2db7b9f9e8b0b0761d
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised websites and disposable hosting, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the embedded URLs and link farm structure are sufficient indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a19ddc8555b---87658388274.pdf In PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/88b4d99d796071a978061918389f4050/44704805435.pdfIn PDF document text
    • https://vas-vill.hu/userfiles/file/tekes.pdfIn PDF document text
    • http://rydelko.pl/userfiles/file/xolisegobozirawevido.pdfIn PDF document text
    • http://www.photonics-science.com/ckfinder/userfiles/files/damikibovotipevizibamiv.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/nutitee2gt5j4i313jcvo0780h/1598432058.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d466268d5a0---61203322518.pdfIn PDF document text
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ab2542e29aa4ba51859b56bb82872610/72729655862.pdfIn PDF document text
    • https://kominove-centrum.cz/media/files/file/99385032386.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/eac24e0845d9fc06dd2964ce7dfde72e/rifirivogobemixazurato.pdfIn PDF document text
    • http://homelife-superstars.com/image/files/texiravukifof.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160d20c88f2dd4---35096586772.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/71028077695.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/b693a79fd1b83b7ff402ca74431cabf9/benenala.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/ndc9db85aet90ugunem53u4719/delitutesutunudo.pdfIn PDF document text
    • http://bytip.net/filespath/files/20210823231910.pdfIn PDF document text
    • http://alessandrobelleseveterinario.eu/userfiles/files/9684541856.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080be2196a85---vidijodazekatefiwu.pdfIn PDF document text
    • https://batikatravels.com/userfiles/file/lumomuxikanofesinujedot.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1608f598d12de2---17681540568.pdfIn PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/214ee91a093eba0a1df51e71e4b50d33/ramelegevinisivow.pdfIn PDF document text
    • http://ping-property.com/user_img/files/kuguxapuga.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608720f371d4e---kimezidimepifal.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=office+ergonomics+workstation+assessment+worksheetPDF 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_off0000e113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE113 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f92a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF92A 10940 bytes
SHA-256: c00cca66d84f59687220fa26208a0a98d9d2efee6b66ca3c15a4e5f7f551831d
font_02_sfnt_off00011271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11271 17420 bytes
SHA-256: 2c63227db28b9797a2605b4dd6818a6121076ace1c4f31b8444822684ca84dae

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