Malicious PDF — malware analysis report

Static analysis result for SHA-256 02a0adf8e31f44a1…

MALICIOUS

PDF

89.5 KB Created: 2021-09-06 10:01:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ee111908de8b029b21eb5df424a9a2d8 SHA-1: dc1fff188b8e0dc00948e68d21d3fa04c3e54e2d SHA-256: 02a0adf8e31f44a1c28ec71dc976293ccfc4f1258576d2e86c49ec31418b6ca6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which are associated with link farms and compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and URL patterns suggest it acts as a downloader or redirector to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9761

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://laborke.ru/uplcv?utm_term=%D8%AA%D8%AD%D9%85%D9%8A%D9%84+%D9%83%D8%AA%D8%A8+%D8%A7%D9%84%D8%B7%D8%A8%D8%AE+%D9%84%D8%A7%D9%85+%D9%88%D9%84%D9%8A%D8%AF+pdf PDF link annotation
    • https://mgogs.com/mgfiles/file/sifalat.pdfIn PDF document text
    • http://gerd-pollak.de/userfiles/file/sanef.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/j5n7lh3gjcmem6ogpq3ikp42u4/78071663892.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/jikewox.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5180f38834---76081775234.pdfIn PDF document text
    • http://bjdfszwy.com/filespath/files/20210804112140.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/0c8a20cc85fd8aa65dfcb448f8e4979d/mupipi.pdfIn PDF document text
    • https://kalimati.in/userfiles/file/zoluwotuw.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd5fe4af3c7---puketavefofixibod.pdfIn PDF document text
    • http://eds-muhendislik.net/ckfinder/userfiles/files/lupuwadumiladekewilugogaw.pdfIn PDF document text
    • https://thinkglobalcompliance.com/ckfinder/userfiles/files/64350353875.pdfIn PDF document text
    • https://projetounificado.com/uploads/files/62199104541.pdfIn PDF document text
    • https://censcakmu.org/board/file/files/rulazejijole.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1606de27374983---43974579677.pdfIn PDF document text
    • https://www.axelendinggroup.com/wp-content/plugins/super-forms/uploads/php/files/150c80b293f0c8babed2c4f5b98a4277/74438584820.pdfIn PDF document text
    • http://laihoawedding.com/app/webroot/upload/files/45080099135.pdfIn PDF document text
    • http://tehnicgaz.eu/files/file/56873341485.pdfIn PDF document text
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210708114940.pdfIn PDF document text
    • http://doctour.hu/uploads/ckfinder/userfiles/files/46825592090.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/nbae6n52ld6t0pcvjs80vvlur1/14889706296.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160d4e09467e8d---wominepozibape.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b3a230e58---30566415861.pdfIn PDF document text
    • https://purefeeling8.com/data/file/vapugafosijosanefir.pdfIn PDF document text
    • http://winfielddeli.com/ckfinder/userfiles/files/29451409463.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/1aba110b4f5668a5db638a2832c83168/sikazawurubojibilumigam.pdfIn PDF document text
    • http://bobiniauto.com/userfiles/file/gemorusotozabojati.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000c641.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xC641 25132 bytes
SHA-256: a32723ecd979c2aa2e369c16d9a342c5e95db8d043c598d3a68591dcb4f5e139
font_01_sfnt_off0000f3e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E4 18320 bytes
SHA-256: 895e1381627cf9ce32a0a9b0a4619ab394139e9fe42ab97fd2503983b9b7c98d
font_02_sfnt_off00012273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12273 9372 bytes
SHA-256: ab692011bb810b4091e5b6863c1468cc19624005727076e0e42723678ec61724
font_03_sfnt_off00013656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13656 18752 bytes
SHA-256: a392d3bf98c0019f20fd44caffa35066ac12c7dc0c3bd94a938589a1abd296ef

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