Malicious PDF — malware analysis report

Static analysis result for SHA-256 d09e6b907545c606…

MALICIOUS

PDF

89.8 KB Created: 2021-09-03 11:32:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 705a3352242f3597f4549cfbf3e58191 SHA-1: cd2bc25110f1dfd5616521698abbf390c395fa99 SHA-256: d09e6b907545c6066141bff3e9392003bdf43d24197016894b1fd5e6cb90231e
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution scheme. The PDF structure and embedded links point towards an attempt to redirect users to malicious content.

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 https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/74ac8e5e3e0d574099724e6ba9473c0f/lijizirez.pdf In PDF document text
    • http://thecreditcrisis.net/clients/73966/File/dejajofawevomanaxu.pdfIn PDF document text
    • https://free-spirit-city.eu/uploads/wysiwyg/files/11531183119.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607de031483bb---66018851886.pdfIn PDF document text
    • http://caramelitos.sk/files/sodesurofefusolupuxotase.pdfIn PDF document text
    • https://calmoinc.com/upload/editor/file/90586372369.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/20c79a9caffe82351960d24b8393379f/tozakujozajidimuvoba.pdfIn PDF document text
    • https://ready4use.ru/uploads/files/boxita.pdfIn PDF document text
    • http://fence-alarm.com/userfiles/files/76042493989.pdfIn PDF document text
    • http://vdadanang.vn/app/webroot/assets/files/jukojaw.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/su2o5u7i15qm4ug9b41ddlv4j7/zuporegadawuzemupezalu.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160876f5ab2c41---69699900759.pdfIn PDF document text
    • http://odnoklassniki-files.ru/images/uploads/files/48801215227.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/m2q7bgf215t2q7gkdonkbkcspb/funevesojose.pdfIn PDF document text
    • http://creative-format.com/upload/editor/files/kixugesirigilolutog.pdfIn PDF document text
    • https://whatshoulditcostme.com/userfiles/file/75019501250.pdfIn PDF document text
    • http://xibuhuanyu.com/filespath/files/20210807122125.pdfIn PDF document text
    • http://stellar.ru/ckfinder/userfiles/files/roruwatosenagaletuwuw.pdfIn PDF document text
    • http://104408017.linker.tw/files/79217241593.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f974bffdff395dbb7eb3c2b675c5cd82/91405255732.pdfIn PDF document text
    • https://mcq-exambd.bdbabymart.com/app/webroot/ckfinder/userfiles/files/vuwinonokewo.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d00685160a7---tidezodedawikikaxivuwali.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/88588065212.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=sql+server+extract+pdf+from+databasePDF 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_off0000f64d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64D 11112 bytes
SHA-256: b659f53d6364676927cfd568449903f6401c0c33db820c9ae1d0f35eb27c27d3
font_01_sfnt_off00010fe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000127fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127FB 19024 bytes
SHA-256: f4ad6798dd95ea308e49934ea4b7dda0affb2a6b84ff36db8f48eb57c046cb72

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