Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d19faed086b149f…

MALICIOUS

PDF

90.4 KB Created: 2021-08-03 09:56:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 916cdff448e49ece264ffdf9d3e015de SHA-1: d7debb3a94a91716b7fceabba99a0c449dae83ab SHA-256: 0d19faed086b149f913f1d9c5e281fc2a3ffdcc6b9b8ba7457c16f3b15f123c1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting an attempt to lure users to malicious content or phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of a link farm on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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://royalwedding.jp/images/blog//file/wikapadisitonavagetog.pdf In PDF document text
    • http://blbr365.com/userfiles/file/1624890345.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/1e0f122707c44f7337b6f6c8f5b56c14/legurarigu.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e5c1918e809---nefosipojepakovulok.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/05f0a7f3ff79c3c6b46a8578bbfc56da/92742636025.pdfIn PDF document text
    • http://aitrans.cn/UploadFile/file/F1202106062301452034.pdfIn PDF document text
    • http://alwaysfavorentertainment.com/clients/879371/File/bixalaf.pdfIn PDF document text
    • http://greatwalledmond.com/ckfinder/userfiles/files/58682268130.pdfIn PDF document text
    • http://toyotarent.hk/FileData/ckfinder/files/20210726_0E9FD9EF8BB17CA8.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0335daee0---fuxesinodigavufodavidogeg.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/smshap96tppt6s1docedjq9p3k/53948458280.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f43d3558bc---70659227849.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f027611695---jaduzoxazi.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/10ok2bmd93bf6ccdg97h32jqoe/73270362976.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606c83947dfc3---mamamoripabujefefidegu.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/8bba1729d7b926b0ae86b7bb53b37e7c/kusuwefej.pdfIn PDF document text
    • http://versobrokers.eu/userfiles/files/lopesenekavagomanutumiso.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160702670b3245---gomukazaxipex.pdfIn PDF document text
    • http://tantex.org/tantex/tantexuserfiles/file/sozutapefojamiw.pdfIn PDF document text
    • http://canhtoanland.com/upload/files/leworanunenabejor.pdfIn PDF document text
    • https://grafconsulting.pl/Upload/file/meximamifowipivifawaliv.pdfIn PDF document text
    • https://sanagustin.cl/files/femas.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/manozevig.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/c6f0ca19403c6073b55a31acbecad9e9/mutefogozizuzuxogilipob.pdfIn PDF document text
    • http://innospectrum.eu/hirlevel/file/62819655300.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087d876ed18d---96499978259.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=luxonix+purity+vst+crack+macPDF 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_off0000f3dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DC 10788 bytes
SHA-256: e619e0a303d2f0dacd77cdf2f5ed67e051f2701d17f5d7f4995ceb5f2f2248eb
font_01_sfnt_off00010cd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD0 21544 bytes
SHA-256: 49c38f6fe21b458cb14f6e5440128c460867c42a92867624d5edd839a193f4ce
font_02_sfnt_off000142d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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