Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b94a53cf028e22f…

MALICIOUS

PDF

85.7 KB Created: 2021-07-17 11:44:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a328fa4795d7735cb11b04c9a6426696 SHA-1: ee4743f87a6edce891d58ef60f631a8643b8be21 SHA-256: 0b94a53cf028e22f2ab180c7729e003a405a43f0ec7e297a90b147daa4ac6d53
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm, with many URLs pointing to potentially compromised websites or disposable hosting, suggesting an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL analysis point to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://fruitssupplier.com/app/webroot/img/files/fepofogonivapopopu.pdf
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074089b75119---xagarusomut.pdf
    • http://anhuizpyy.com/upload_fck/file/2021-6-11/20210611052730792664.pdf
    • https://bnbcostaverde.it/userfiles/file/kuvesuxexeropozofexodijox.pdf
    • https://baxsporthorses.nl/userfiles/file/17391620673.pdf
    • http://fixafilm.se/userfiles/file/lumalonabazanoselesobanaj.pdf
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607f377d6c703---92728840161.pdf
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608cfb8fed4f2---44487017954.pdf
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/7790b75e07ca63f217cce896c931c200/96683314480.pdf
    • https://jackyrouxmethode.com/userfiles/file/98864709340.pdf
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/v09q3g3ar9o222sfnvcvh7pd1q/95156774646.pdf
    • http://soupworld.de/upload/file/nobupiroveba.pdf
    • https://www.rekalibracija.com/wp-content/plugins/super-forms/uploads/php/files/63f4c829ca346b230755977fc050c88b/5895921374.pdf
    • https://daxitrip.com/basefile/daxitripcom/files/tajaduwug.pdf
    • http://prime-standard.com/piceditor/file/nuvapujemaxamexixekujab.pdf
    • https://tonwen.org/userfiles/file/12816262226.pdf
    • http://ahsaipu.com/v15/Upload/file/2021514543587882.pdf
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c93af79d172---sewepunuxojuwibosezone.pdf
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/37995a5b15a3e174fe114cf55cd89cb4/85846889194.pdf
    • https://parquesanalbertohurtado.cl/ckfinder/userfiles/files/18947949420.pdf
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c6ab74c5849---savalamuvek.pdf
    • http://dianacb.cz/userfiles/file/lafabimipavarotigotetow.pdf
    • https://arerp.kr/data/file///wexavojenu.pdf
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/1c76f3fd0f9c59c4471592c8c11b7679/72033868331.pdf
    • http://saintthomasmonrovia.org/clients/a/a7/a774d5b45fc75aba9c6fcf07501e1e58/File/vowewekawajomisa.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=daily+newspaper+pdf+free+download
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebda.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDA 16792 bytes
font_01_sfnt_off000103f1.bin
a38fcc850074734c6a46814c2fd86866eb88dd6fc532b6c03371419cbd1fae06
pdf-font-stream PDF embedded font (sfnt) at offset 0x103F1 10596 bytes
font_02_sfnt_off00011c4a.bin
d3da6758047af4923308dc8d4410b41e5c8821c6ddbcaeea8e2e521f5078c466
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C4A 17160 bytes