Malicious PDF — malware analysis report

Static analysis result for SHA-256 7722f68094da6039…

MALICIOUS

PDF

83.9 KB Created: 2021-08-11 09:24:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: cad2cd5d70e7508dcb38f9a84fed1012 SHA-1: 2c15e94b988fa32886b4cbcba49b6b482f950599 SHA-256: 7722f68094da6039e59ad447828c09ae93d24fc6758bd92a65f274879f991638
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier with high confidence. Heuristics indicate the document functions as a link farm, with multiple URLs pointing to compromised WordPress upload directories. These links are likely intended to redirect users to malicious content, such as phishing pages or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608c9c23eaf40---wazele.pdf In PDF document text
    • https://globalcareerclub.com/FCKeditor/userfiles/file/4987071875.pdfIn PDF document text
    • https://avenue102.com/uploads/file/vedimezodafuzifazituwo.pdfIn PDF document text
    • http://robertfeinberglaw.com/images/edit_images/file/70197493802.pdfIn PDF document text
    • http://antoniolescio.net/userfiles/files/52584271106.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085229f76c54---zopuvudidelokapel.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160cbd5754cbd0---pazunabok.pdfIn PDF document text
    • https://butchercurnow.com/img/shop//contents/livuvorimonolabikemobodid.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/985688037d220ee70b37a36702ba3c95/3254620801.pdfIn PDF document text
    • http://ceroki.com/image/files/92802298790.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/files/74773679519.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608d6de077311---nujolukowatil.pdfIn PDF document text
    • http://shriadinathbank.com/uploads/4978801434.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1609897d0c6536---16539102605.pdfIn PDF document text
    • https://www.alapan.org/fckimages/file/50206085004.pdfIn PDF document text
    • http://arlingtonhigh1960.com/clients/881088/File/xetuzasawasusitukubalax.pdfIn PDF document text
    • https://spotiverify.com/ci/userfiles/files/mugabonebufog.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/sb06a3ckt8da997cv0e48s2nh2/8105780827.pdfIn PDF document text
    • http://bloomx.com/sites/all/sites/bloomx.com/files/97386863294.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/b0b6c25e530eefa7686c3d339a68b46d/zotebitub.pdfIn PDF document text
    • https://santchavarabed.in/ckfinder/userfiles/files/6037961410.pdfIn PDF document text
    • http://kanchanaspa.com/ckfinder/userfiles/files/3560073576.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16090cde0b19a2---2555806644.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=partitura+de+titanic+flauta+traveseraPDF 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_off0000e15f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE15F 10516 bytes
SHA-256: 28ef4cc04f145891f5ab22e02ac52569f27b5173291db49b6b70cef6f124154c
font_01_sfnt_off0000f973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF973 18048 bytes
SHA-256: 12f787b834a8744780a845b7082820f4226f1be599e0b5633793d71298561bec
font_02_sfnt_off0001275d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1275D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1