Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ab7234f6ddd9a38…

MALICIOUS

PDF

92.0 KB Created: 2021-07-15 13:21:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 080c05f5609f84e741e8c71c63897249 SHA-1: f6308c63462f4b91f22508a911a4d41b1cc0034e SHA-256: 0ab7234f6ddd9a38093ad67a98eca1de71fbc7124d18a669e798e2ea58c3050c
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to compromised websites or disposable hosting, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://falerisztika.hu/tmp/53016177182.pdf In PDF document text
    • http://pkynfe.net/userfiles/file/55295828212.pdfIn PDF document text
    • https://thinkglobalcompliance.com/ckfinder/userfiles/files/pijaxawiluxaxoso.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ea2844351---jukuzufowor.pdfIn PDF document text
    • http://waypl.pl/upload/File/folurugumuxit.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/pvf59po9uhddr9pkemtjnq14v4/batupavifuxeju.pdfIn PDF document text
    • http://autosklo.sk/pictures/file/lagibakeribena.pdfIn PDF document text
    • http://klpa.net/userData/board/file/71979058296.pdfIn PDF document text
    • http://hms31.ru/img/file/bejujulojenipum.pdfIn PDF document text
    • http://marymo.ru/uploads/files/pugejazepevidilubupomi.pdfIn PDF document text
    • https://himalayanthailand.com/image/upload/File/niwuzivexutibuvefi.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c5bf4cd7cf1---2037766926.pdfIn PDF document text
    • https://bruceautoservice.com/files/file/12861423848.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/69b26e0d8181bbbe9306504773f1c8b0/18670390351.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160872eed56064---dudemu.pdfIn PDF document text
    • http://train-in-japan.com/images/blog//file/zejizefabikuxegikesupomel.pdfIn PDF document text
    • https://peterdegendt.be/file/83688905123.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/1bcc187b1b5a564f90034bbfb42f4aaa/runawofisig.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/6e57251515861eb564c14bc5335c5993/66410419584.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/16091bcae75cc2---22769028657.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/258f73a9b3d925bff503223fd678cf7e/2869477932.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/65f9561968541bbc9cd100ce7e8393c2/38690815421.pdfIn PDF document text
    • http://tcurryproperties.com/konadnew/userfiles/file/4194214097.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/jusigikefe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=first+vice+presPDF 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_off0001047b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1047B 18860 bytes
SHA-256: d8736e29df3d46a6abf61a9eb651653da0b18775ef7641aa0919141f6740d673
font_01_sfnt_off000134b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134B0 9976 bytes
SHA-256: b7d9c40869d44212d466d6c419bbf2a7b3f97a5bcf89cd0be48569f39d2be90c
font_02_sfnt_off00014af3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1