Malicious PDF — malware analysis report

Static analysis result for SHA-256 df5794a7843da622…

MALICIOUS

PDF

89.9 KB Created: 2021-08-16 08:22:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6f67691de6a29bc3e8e4fa1d63cb7a25 SHA-1: 6e1831d282453a84bf16df2849e2c2e13fdab8eb SHA-256: df5794a7843da622a6e8f5accf364b80f129ec32f7ae3310900b6638d140b818
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/e30d2db2ccf7954c4819de0eaced84c9/90106772148.pdf In PDF document text
    • http://skupka54.ru/upload/m/14383442556.pdfIn PDF document text
    • http://appartenvue.net/appart/upload/images/madojexupedekagopusawo.pdfIn PDF document text
    • https://madopin.com/calisma2/files/uploads/luritojesedenevir.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c4ddf88904f---92367569169.pdfIn PDF document text
    • https://peilimineko.com/userfiles/file/490872707.pdfIn PDF document text
    • http://northcity.rs/slike/files/83266400348.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dba6e186fa---zasovipujanasisidujusanem.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16072a861be6f5---waketumiwukuvejexeg.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/1vvjk6qiou1d7al37cs6aoq015/93187105644.pdfIn PDF document text
    • http://finemetal-cn.com/upload/files/sesulovu.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606c89170b1a6---poketakimevometigebose.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/di5th5tovd02vd1ep5krtpf0q4/4039683067.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/7826269991.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ada879c9e01---77664069462.pdfIn PDF document text
    • http://df-2.de/images/daten/file/12419543216.pdfIn PDF document text
    • https://zop.bg/webroot/img/content/files/59273107462.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609408cd79b04---32769051919.pdfIn PDF document text
    • http://cartonwrappingmachine.com/userfiles/file/mijovulejadafax.pdfIn PDF document text
    • https://www.deuba.info/wp-content/plugins/super-forms/uploads/php/files/vijepb8u8438v2l2ltn612ff7c/pifivokerefo.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/4a23c08ab9f54938d18da180fd231bac/vobovesuke.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c59739bfe83---57898156403.pdfIn PDF document text
    • http://shelton1961.com/clients/35589/File/76093005756.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=hopeless+land+hack+mod+apk+2020PDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dde9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE9 16160 bytes
SHA-256: 27fa49ca30b1f57c6e4f8b99ad1f73ead7010ce1f191e20d716503af09158f46
font_01_sfnt_off0000f362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF362 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010b79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B79 10812 bytes
SHA-256: 28cd89f35b2cc779caacaa51670331a07fab8a2520ca45fd5e40d6284c602fc5
font_03_sfnt_off00012427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12427 1688 bytes
SHA-256: 7096b627df108118e2083664a2c044df1fb2ab29bf1d3cefdf3b87703bac1563
font_04_sfnt_off00012c33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C33 17120 bytes
SHA-256: bb6d8c9580b127315f2504f7bec563e7f7787cc1e96830ab608b291a3ab1df0b

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