Malicious PDF — malware analysis report

Static analysis result for SHA-256 d01fb63284d2372b…

MALICIOUS

PDF

84.1 KB Created: 2021-09-02 22:31:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 07e7179a65fc44175deb50ad5788c5aa SHA-1: c1c4260b7fd14915a7c995cb436c645e7c9e24a4 SHA-256: d01fb63284d2372b0f3d855a625e8ac3f38859631cd18c736b4322367dd93177
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://masterkontroll.hu/ckfinder/userfiles/files/85666766548.pdf In PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607640e4be044---63483211948.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/klh9bgoh5v6pfdjgoaaji1uk4a/tusafagabivalapesewo.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608a6eced8937---minuguwuposavoragovu.pdfIn PDF document text
    • https://smartcirclegroup.com/userfiles/file/vakarorixip.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/28681727585.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/gclu9bk3p5pg1v0kl9m5qepg31/lulekakuxunixarotinisa.pdfIn PDF document text
    • https://wildnaturetravel.com/File/likigubeg.pdfIn PDF document text
    • https://arerp.kr/data/file///66093813850.pdfIn PDF document text
    • https://goodmix-psc.com/userfiles/files/9927408814.pdfIn PDF document text
    • http://reclameindex.nl/images/uploads/76212817571.pdfIn PDF document text
    • https://hometeamcorp.com/images/usr/tinusojofuji.pdfIn PDF document text
    • https://synodradomski.pl/userfiles/file/5396541597.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/20298185689.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160d57510b5942---73709211879.pdfIn PDF document text
    • http://salonmysliwskirys.pl/userfiles/file/derabovufufilelidurixopep.pdfIn PDF document text
    • http://ipceurope.eu/assets/file/57449504657.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/161287346b6fdb---soreselob.pdfIn PDF document text
    • http://szyuangang.com/UserFiles/file///firakuti.pdfIn PDF document text
    • http://belgium-ex.com/images/blog//file/futotozetapo.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/63335624247.pdfIn PDF document text
    • http://hiro-seiko.com/upload/files/lukudevakinovawig.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/lokobaso.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/eit3kkpu0qlclb3cco828auk24/bojukisejitexoko.pdfIn PDF document text
    • https://lotte-ppta.com/beta/assets/file/46614464047.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/f2b22d0d0edf3ba716ba01f6fd0ac98e/93352664867.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=example+of+resume+for+internship+pdfPDF 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_off0000e27c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE27C 18236 bytes
SHA-256: 08901bee17d7c470edbe7b57bb53b68fb48ac2caaf2da4cf7115b5da64b35e3a
font_01_sfnt_off0001114c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1114C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12963 10948 bytes
SHA-256: 821c9534a2b54c9c09610a0446121e6ac262fbadabe082a1652de7f0256b96eb

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