Malicious PDF — malware analysis report

Static analysis result for SHA-256 0328225f254674d3…

MALICIOUS

PDF

84.3 KB Created: 2021-09-09 07:48:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2646514fe584c90d4c8a3a4ec722885e SHA-1: 01703d7dd700ed6b74b10ea6925a7bda100e6d71 SHA-256: 0328225f254674d3f2c3cfea729047fe2d2ccf1a38f997eff5046db5e36ffa67
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external websites, some of which are hosted on disposable domains or compromised CMS uploads. The embedded URLs suggest an attempt to redirect users to potentially harmful content, aligning with phishing or malware distribution tactics.

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://tamlaproject.com/userData/board/file/3090543773.pdf In PDF document text
    • http://reguitti-engineering.it/userfiles/files/sokuludotazelarige.pdfIn PDF document text
    • http://muzeumostrowiec.pl/obrazy/file/sovafomo.pdfIn PDF document text
    • http://octapus.vn/images/uploads/files/54494245312.pdfIn PDF document text
    • http://topenglish.sk/app/webroot/gallery/files/25113305618.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136f40ebd934---ruduloduwabaloke.pdfIn PDF document text
    • http://kasintorn.com/images/upload/files/sopulikine.pdfIn PDF document text
    • https://noticky.net/akce/fotky/file/64032942542.pdfIn PDF document text
    • https://simondaulte.com/ckfinder/userfiles/files/7703135947.pdfIn PDF document text
    • http://vaness-sens.fr/ckfinder/userfiles/files/suzakidedikufuxuvuvebu.pdfIn PDF document text
    • https://chrmglobal.com/userfiles/file/6276893512.pdfIn PDF document text
    • http://anapharmata.hu/ckfinder/core/connector/php/files/wufojufaxutefagage.pdfIn PDF document text
    • http://ominocoibaffi.it/userfiles/files/27718693702.pdfIn PDF document text
    • http://camonetinternational.com/files/file/217858112.pdfIn PDF document text
    • http://zhjpharm.com/upload/files/88167218008.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135683e30e38---89489472034.pdfIn PDF document text
    • https://gtnet-engine.com/ckfinder/userfiles/files/64875656397.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133763dca7d4---32556165082.pdfIn PDF document text
    • http://ms-domino.eu/images/file/files/pakowigidaxofate.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133c2a90cd53---nezomizizuzu.pdfIn PDF document text
    • http://dtyxbpzx.com/filespath/files/20210909074225.pdfIn PDF document text
    • https://pnp-studio.com/fckeditorfiles/file/makajefanatiliziligikolib.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/161393ee0766c7---82719545144.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613783b147ed5---lepapugodilamisinonoloniv.pdfIn PDF document text
    • http://reelproductionshd.com/userfiles/file/sadovuriperisalage.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=redmi+note+8+original+display+price+in+bangladeshPDF 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_off0000e204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE204 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1B 11468 bytes
SHA-256: 04ed736e7c8225327555d2b66bc91a6dd4866787cabc1394b2024daba6c771fc
font_02_sfnt_off0001149f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1149F 17964 bytes
SHA-256: e56c4d3e58493aaa566b724029928ef7a78f2ed130822be3caf08c374403fb63