Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3731518e84ccbb2…

MALICIOUS

PDF

81.2 KB Created: 2021-09-08 13:17:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: dd26ea7a1d564815794cc6b674fd40ea SHA-1: e463532d039407b43f0e6787923a59494f967bf3 SHA-256: d3731518e84ccbb224abdd76bef7a84db7a960b964e53bd512c443232201bf17
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external files, many hosted on compromised websites or disposable domains, suggesting a link farm or redirection mechanism. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway security. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://helloslow.com/data/userfiles/files/17806858454.pdf In PDF document text
    • http://cmtoolsrental.com/user_img/files/welaveju.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f2891b1046---xisazuweninode.pdfIn PDF document text
    • http://eurolocal.info/sites/default/files/images/file/natopuxaf.pdfIn PDF document text
    • http://jeyadhurgatemple.com/userfiles/file/78240595805.pdfIn PDF document text
    • http://busto-wl.gattinonimondodivacanze.it/themes/userfiles/files/33626730483.pdfIn PDF document text
    • http://fongyoskert.hu/userfiles/files/xonomigejag.pdfIn PDF document text
    • https://www.traitagri-solutions-alternatives.fr/ckfinder/userfiles/files/piganasukowoxovutidu.pdfIn PDF document text
    • http://bjerkelunden.org/content/files/userfiles/file///53794839631.pdfIn PDF document text
    • http://laclonghotel.vn/upload/files/56238081428.pdfIn PDF document text
    • http://studioriggio.it/userfiles/files/22428904655.pdfIn PDF document text
    • https://ifbscalidad.eus/files/galeria/files/lafupad.pdfIn PDF document text
    • http://vladjurnalist.ru/archive/file/53419075031.pdfIn PDF document text
    • http://jnejendomsdrift.dk/userfiles/file/82997284448.pdfIn PDF document text
    • https://aicpwdosaeast.com/ckfinder/userfiles/files/botepikovemuduforijutukuk.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613151d18fa03---wozomilifepuvamobelenifug.pdfIn PDF document text
    • http://eclickapps.in/userfiles/files/fuxoderomaborigu.pdfIn PDF document text
    • https://moveo-sport.pl/userfiles/file/34679075184.pdfIn PDF document text
    • http://billagelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/govosupuwomasozarapag.pdfIn PDF document text
    • http://www.medic-pneumolog.ro/fisiere/file/karubolapufozotubivopudo.pdfIn PDF document text
    • https://webhosting4.net/media/file/sepimobaked.pdfIn PDF document text
    • https://wonwon.taipei/photo/file/notoburedetilubisebum.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612f09de0e0fd---dufolakuve.pdfIn PDF document text
    • http://aaronandanthony.com/userfiles/files/6057994953.pdfIn PDF document text
    • http://pumarecovery.com/userfiles/files/9323814475.pdfIn PDF document text
    • http://naturalfurnish.com/userfiles/file/99626595769.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=spanish+worksheets+comparatives+and+superlativesPDF 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_off0000d391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD391 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA3 18692 bytes
SHA-256: 2ecc183562d9e88be6f71bce838ea7bdb6ae46f3106a543ff02c0d728546450a
font_02_sfnt_off00011c52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C52 11196 bytes
SHA-256: cdd1877bf3dda36bbc62dc1e97187296ab016afb2edb7443aa058c1055950090

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