Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cc3a44c59302d63…

MALICIOUS

PDF

77.9 KB Created: 2021-09-19 23:31:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7602674c5c5a9585e20658c6d1bf45fb SHA-1: 1786116810a247263d030447ea8383c6e589b4a7 SHA-256: 1cc3a44c59302d638769bc634c9ee0fc5764fdc358e99aaeb3922ba28c0a5a24
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS uploads, indicating a link farm designed to direct users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/bb702a265b58579cb7ef7cd2bad06c2d/pamokuxopotozodebow.pdf In PDF document text
    • http://burchiellati.com/file_fck/file/gemani.pdfIn PDF document text
    • http://macautemple.com/userfiles/file/12807698349.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/0f7df6e776bf555553bf4cc967d705a8/27905345476.pdfIn PDF document text
    • http://www.northern-japan.com/image/upload/File/laraxotemakeba.pdfIn PDF document text
    • https://jobtiara.com/files/files/62239489375.pdfIn PDF document text
    • http://www.oomewatersport.nl/upload/files/ronutumujipu.pdfIn PDF document text
    • https://produktybhp.pl/pliki_user/File/bavivar.pdfIn PDF document text
    • http://pathtojanna.com/userfiles/files/13315199907.pdfIn PDF document text
    • https://dortmundpools.com/contents/files/rudikevevi.pdfIn PDF document text
    • https://nangluongvada.com/uploads/files/nopatetorulozafinizew.pdfIn PDF document text
    • https://pensiuneaselina.ro/userfiles/file/46922339134.pdfIn PDF document text
    • http://ventilatoryzlin.cz/images/file/vixawabosanew.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130e941aea3a---66280822244.pdfIn PDF document text
    • http://ryanoomen.nl/uploadimages/files/patobiguvaxusa.pdfIn PDF document text
    • http://chinawin-consult.com/userfiles/fotijafelejilijexom.pdfIn PDF document text
    • http://yangs-ns.com/ckfinder/userfiles/files/20210903021227.pdfIn PDF document text
    • https://techlan.pl/files/file/31425348473.pdfIn PDF document text
    • http://dlzhrjd.com/images/uploadfile/files/waleda.pdfIn PDF document text
    • http://www.polni.si/Images/files/dotawuvabugivaferuwezaj.pdfIn PDF document text
    • http://roland-toys.eu/userfiles/file/11118266728.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137be90cdfaf---nuxituzepolibuxapef.pdfIn PDF document text
    • http://dvif.fr/userfiles/file/35397472717.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+transfer+photos+from+android+phone+to+computerPDF link annotation
    • http://louisiana-arts.org.s150269.gridserver.com/siteuploads/editorimg/file/jewugukiz.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBBC 11016 bytes
SHA-256: 9f0e2f4d494da043f26b6a34eacb05438d3a91a81c4e8b56a76f9f94e4ee93e0
font_01_sfnt_off0000e52a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE52A 17296 bytes
SHA-256: e34812dfd8220aaf301f2a8571f18e3413072593eef0c4492e1c038f5e043e6a
font_02_sfnt_off00011183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11183 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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