Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e0cba0e7e9ab9a0…

MALICIOUS

PDF

86.3 KB Created: 2021-08-25 01:36:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b33bd98b995bc11a7f006f105dcbb4ac SHA-1: bcd969829d35da972041e69fbe53c9535a9795ff SHA-256: 2e0cba0e7e9ab9a0bbb26b0e5830e642681b73ea23ceb9cddb2949985ea1cf7c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress sites and other potentially malicious URLs. The presence of embedded JavaScript, though not fully detailed, suggests an attempt to further exploit the user or facilitate payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cructi.ru/uplcv?utm_term=how+do+you+say+september+in+spanish PDF link annotation
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160850c6ad5032---76038380549.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/2f7113e6f957ab509d0ec42931b3a43c/xisufedorezesitelokifexug.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/16071ece66e405---19561111867.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160868165377dd---51656345661.pdfIn PDF document text
    • https://barcelonamedicalcenter.com/files/galeria/files/fewojokodimogok.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/79c3a20496f773aba8aca8c8698864b2/53097247948.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210509114607200.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a56566d20ad---lexidowokejogofawi.pdfIn PDF document text
    • http://risorsaterra.it/userfiles/files/6148045687.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/9o6jk9nbbjkgju5stcou5ik639/64212426656.pdfIn PDF document text
    • http://burchiellati.com/file_fck/file/jarotugabun.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/044b1b0b970da809c0cc012539b95ab8/buzijavagetukemutibezire.pdfIn PDF document text
    • http://metisentry.net/ckfinder/userfiles/files/fodal.pdfIn PDF document text
    • http://drthchowdary.net/userfiles/file/fisikajipeso.pdfIn PDF document text
    • https://siroyensao.com/upload/files/75398198110.pdfIn PDF document text
    • https://sgcaregiver.org/contents/files/fabif.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3934fb2b67---govapojo.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610aba9b9c9b0---4980928310.pdfIn PDF document text
    • https://jurad.eu/files/file/51977024187.pdfIn PDF document text
    • http://danies.ru/ckfinder/userfiles/files/90983077927.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/4ab05af82474dc65f5edfcd92af35dbe/lanutoziwefajanonawefabuw.pdfIn PDF document text
    • http://www.polni.si/Images/files/bijazinofusov.pdfIn PDF document text
    • http://hoanggiaphatland.com/uploads/image/files/zobixumixulusanibe.pdfIn PDF document text
    • https://xn--80aanugxqi.xn--p1ai/admin/ckfinder/userfiles/files/43885088792.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/mofebefifaridowaxagoka.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_off0000d2a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A2 11040 bytes
SHA-256: a4b4528dbdd9b00aee1f5a870d46c1ec2ad62ca13f34db5b82bded074fdcb5ed
font_01_sfnt_off0000ebec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000103fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103FD 16252 bytes
SHA-256: bfc7ce51a1a9b37382af61f0075eb0cdb972126da031002d338643432d80e6e4
font_03_sfnt_off000119d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119D9 19440 bytes
SHA-256: 1eb3f9f8b1a3a737ce39c0af176edd3cc75d502e7350764dcf2533dff62f994b

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