Malicious PDF — malware analysis report

Static analysis result for SHA-256 e47ce73b2b5f696c…

MALICIOUS

PDF

84.5 KB Created: 2021-06-29 10:20:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 05781caed3690520b766ba7bceadaa57 SHA-1: 357428033b0f78509d7b79bc25ae1fd5f3456ccd SHA-256: e47ce73b2b5f696c8b9e2756f228623e0861486181b0c3c3abc14da2b1558364
156 Risk Score

Malware Insights

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

This PDF was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous URLs pointing to compromised WordPress sites and disposable domains, suggesting an attempt to lure users to malicious content. The presence of multiple distinct hosts and UTM parameters further supports the link farm and potential phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9780

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://inwebjor.ru/uplcv?utm_term=client+assessment+in+therapeutic+recreation+services+pdf PDF link annotation
    • http://driver-jazda.pl/upload/file/130961417.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/rebpjgfnvukf8a33lfn3due453/12173551507.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/7f4409979c7710ee73ddc37939bc9f13/siropemegetilo.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/12237c557eee730645d51a17c14c3219/51997223439.pdfIn PDF document text
    • http://agiteam.org/clients/b/b0/b0c4817036ef1cb73596cc935f3fa86d/File/nemapoda.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/7on8bqidfjkkagre1s9aipmghk/bomezas.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/zezolosazafa.pdfIn PDF document text
    • http://charivne.info/images/file/76420836536.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/f4c905f602ad852deb202f275b9a06f0/taxixazedeni.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f222c42e47---tokiruxusu.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/78fd4dd7dff456de046fb9a2311bfc9e/57421842092.pdfIn PDF document text
    • http://maihome.hu/admin1/file/gurijezisotajivap.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/983ed97307e704afbc76a8499ded87d2/rupugesoja.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/f5tfcatleeeo3bf4k55vgjdbrn/48221300415.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b234b1a079e---65896784932.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/0bb5a7b2a6d3bf767947895e9d8eaef6/60425428168.pdfIn PDF document text
    • http://banhangcongnghe.com/upload/FCK/file/81246272945.pdfIn PDF document text
    • http://bigandtallking.com/userfiles/file/wawutorukomijepu.pdfIn PDF document text
    • http://eastmoorclassof1970.com/clients/4/43/4343e427eb1b0a0668350338a4d6b623/File/17614937993.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/177e6266d2e80c34ba08e0da4b32df19/67443938023.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160b838ae6aa4e---xirigatafivabibanatubun.pdfIn PDF document text
    • http://malbreil.com/userfiles/file/jimilo.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/73046024487.pdfIn PDF document text
    • http://fatamorgana.fr/uploads/assets/file/miruwug.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/60839780873.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087167eeb2f1---tulemubulura.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dafe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAFE 17148 bytes
SHA-256: 78c865ef7a95a6632c5114460dfd00091bbb721b9d8e87d5abf1af034f93e919
font_01_sfnt_off000107c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C6 11084 bytes
SHA-256: 7c2a6392b059311f47ffd963b1094c529fb5c83a16de6bfa223e3047b0d135ca
font_02_sfnt_off0001215f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1215F 2312 bytes
SHA-256: 85106071461c580fc1acd299865c151775e7a45ef1d32c7514147556c726e712
font_03_sfnt_off00012b8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B8E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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