Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbee0ef1da4dae56…

MALICIOUS

PDF

84.0 KB Created: 2021-09-09 13:01:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 48a37a347347ebf45b9b0eaefb55237f SHA-1: 8a1a7cbc77137af8017dd1c1910ecda22402e760 SHA-256: bbee0ef1da4dae56b114f1ef6440427183565e8dab6abcaa87f38e644b10a7d6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple potentially compromised or disposable hosting sites. The embedded URLs, such as http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/161393e9de5d66---tibedabubujukuzes.pdf, are likely used to distribute further malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://old.arcnet.org.tw/ckfinder/userfiles/files/zuzexijubupimunonebolajo.pdf In PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/27d132b640c06aa307bd80abe75ef98c/raxasuvuk.pdfIn PDF document text
    • http://rhondachem.com/d/files/tedukafasumafasujeliw.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/37428964644.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/161372807c6c74---54020752117.pdfIn PDF document text
    • https://quatcongnghieput.com/uploads/files/bexubulolonobubidijox.pdfIn PDF document text
    • http://vanhacollection.com/images/files/jipavaworuxuboweneg.pdfIn PDF document text
    • https://bodymason.com/user_uploads/files/magijame.pdfIn PDF document text
    • http://bjxbw.cn/userfiles/file/pevod.pdfIn PDF document text
    • http://zpkprzemysl.pl/ckfinder/userfiles/files/20315277896.pdfIn PDF document text
    • http://universalestetic.com/userfiles/file/kapifaz.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/27dcb11963b61be6a7438a2f06fa65c9/jakifojatijani.pdfIn PDF document text
    • https://taevlingar.se/images/pages/file/mokok.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/nerujivel.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/ec54248c80022c313f8105ab0856ed6c/gitakavolakuzudusovakuw.pdfIn PDF document text
    • http://styrexon.cz/userfiles/file/zawex.pdfIn PDF document text
    • http://vuason.vn/upload/files/waxerisizijoguxuko.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/165565264961318e4d5f387.pdfIn PDF document text
    • https://www.bramfordgc.co.uk/ckfinder/userfiles/files/mafek.pdfIn PDF document text
    • http://gesundimjob.at/images/content/files/dixurokuxix.pdfIn PDF document text
    • https://sarenpinler.com/calisma2/files/uploads/ruzelukisegilef.pdfIn PDF document text
    • http://chatfieldfarms101.com/userimages/89953669686.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/161393e9de5d66---tibedabubujukuzes.pdfIn PDF document text
    • http://szwygs.com/upload/86473543995.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=app+to+limit+screen+time+androidPDF 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_off0000e317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE317 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB29 17992 bytes
SHA-256: 874b3226158a2236b4046a0f62f5caec332a10ad20de2c07359a18ae525b4fb1
font_02_sfnt_off000129bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129BC 10656 bytes
SHA-256: a41a55e8bbcaf041091898083907296928cd68609be630cf458f8dfad33d2948

Open this report in the interactive analyzer, or submit your own file for analysis.