Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2271a4d9e8d17ac…

MALICIOUS

PDF

90.7 KB Created: 2021-09-03 06:34:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 38f8ceba8206bfe821a4c635537a19ff SHA-1: 123e7398d1a14406e660b21e21549b03707d33ca SHA-256: f2271a4d9e8d17acf1aa8439a9ce09c8420cd96f3ad8d978c35cc03c67fe01ff
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating it is likely a phishing or malware distribution lure. The file functions as a link farm, containing numerous embedded URLs that point to various websites, some of which are hosted on compromised CMS uploads or disposable domains. These links likely lead to malicious content or phishing pages, attempting to trick users into downloading further payloads or divulging sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://irlanc.ru/uplcv?utm_term=krk+rokit+5+manual PDF link annotation
    • http://gospel-pour-100-voix.com/fichiers/newsletter/file/lofetaxet.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-5-28/20210528092042171597.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075669bec2dd---25071591213.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/35895870e5f58b9d5f738454da7e524b/74340125597.pdfIn PDF document text
    • http://fsnmmaterials.com/UPFILE/userfiles/files/97830858198.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6da94064e4---daziganuponik.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a31d7c21ea2---8868950697.pdfIn PDF document text
    • http://slesnick.net/userfiles/files/54895767983.pdfIn PDF document text
    • http://conblocmanado.com/pics/file/mawidafutuvikuwifil.pdfIn PDF document text
    • http://tizianaiberti.it/userfiles/files/53255762594.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/45513777307.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/notimowojewafibajepifofa.pdfIn PDF document text
    • https://cplastik.cz/data/cms/file/tedisirolonobivuki.pdfIn PDF document text
    • https://ckd-otto.com/contents//files/45815442987.pdfIn PDF document text
    • http://dentalclinicbangalore.com/uploads/80942749726.pdfIn PDF document text
    • https://ildiko-szepsegszalon.hu/userfiles/file/nowikebape.pdfIn PDF document text
    • http://c2r-auto.com/uploadfiles/file/2021052417503473499.pdfIn PDF document text
    • http://xn--80aatg4aaaddkhfhbf3evf.xn--p1ai/ckfinder/userfiles/files/10127821830.pdfIn PDF document text
    • https://www.edmcenter.xyz/ckfinder/userfiles/files/liruwoni.pdfIn PDF document text
    • https://optimuselearningschool.com/learning/site/images/uploadfiles/parawopimajazatixelegefez.pdfIn PDF document text
    • http://laclonghotel.vn/upload/files/24499116634.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160c998e442a84---39694268403.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/5e8d6e0f7055576f2bc7bf9483dbb364/73743579150.pdfIn PDF document text
    • http://healingtown.org/userData/board/file/36626175479.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_off0000fc05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC05 10288 bytes
SHA-256: b08ce2b812bf3cbcc4ce97fa5c3766c843f89b36c1ecf42f944095bd7054bf5e
font_01_sfnt_off00011326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11326 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B38 19032 bytes
SHA-256: 6f4fe804d65b6ecd9c3e8631d37364acc8be83672b1a2d29e342dcab2933d749

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