Malicious PDF — malware analysis report

Static analysis result for SHA-256 60dc85bf5bef204f…

MALICIOUS

PDF

94.0 KB Created: 2021-09-15 09:23:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c9cc72d13fff6ce88a1890c2f645bd48 SHA-1: 97d8c066e42b6a823762da40ce0b6b25f76089eb SHA-256: 60dc85bf5bef204ff41659913580419f518912a7ca47b280a2ada0dea4f0e33a
164 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, some of which appear to be hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution scheme. The presence of a 'download button' heuristic further supports the attack pattern of luring users into downloading potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9888

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=harry+potter+bluray+download PDF link annotation
    • http://www.koeru.eu/failid/file/80932530448.pdfIn PDF document text
    • http://faw-asia.com/image/upload/files/puneginuroxikekipif.pdfIn PDF document text
    • http://donahoelawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/38895974465.pdfIn PDF document text
    • http://revucue.com/ckfinder/userfiles/files/52652832202.pdfIn PDF document text
    • http://iknow.pl/files/file/5200037744.pdfIn PDF document text
    • http://razaviota.ir/basefile/razaviotair/files/fatinejeju.pdfIn PDF document text
    • https://sonntag-immobilien.lu/userfiles/files/nogik.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613864436bb08---81872656937.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/wuselesananobir.pdfIn PDF document text
    • http://gizmakina.com/depo/sayfaresim/file/mowovaxulipizo.pdfIn PDF document text
    • http://dostrojar.sk/UserFiles/file/tumukawarenekunef.pdfIn PDF document text
    • https://ipic.vn/userfiles/file/sazixofubiwak.pdfIn PDF document text
    • http://sbriz.ru/userfiles/file/webopozexaw.pdfIn PDF document text
    • http://shinyoungvalve.com/userData/board/file/terotawibiv.pdfIn PDF document text
    • https://efnnma.org/files/file/kerolipas.pdfIn PDF document text
    • http://www.emploi.nat.tn/ckeditor/ckfinder/userfiles/files/miwamarozofel.pdfIn PDF document text
    • http://talk200.com/admin/admin/uploadfiles/file/82929773970.pdfIn PDF document text
    • http://design-klasse.de/ckfinder/userfiles/files/wogipolosa.pdfIn PDF document text
    • http://pass38.com/images/contentimages/files/95295769506.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/0f9vu7fsokpht4qev9vbc2kesq/megoremasozuvilifomusam.pdfIn PDF document text
    • http://qlionshousing.ca/userfiles/file/57446346915.pdfIn PDF document text
    • http://irfanmakina.com/depo/sayfaresim/file/jukivogajubaginoso.pdfIn PDF document text
    • https://mollis.rs/files/18270978933.pdfIn PDF document text
    • http://duonglaohanoi.com/userfiles/file/62674919749.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/66931178213.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614120a2c39da---50473451739.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_off0001084d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1084D 18856 bytes
SHA-256: ae9d7fd48a36f28107cc21ba89218b7498509d1d58cf8803ec3ac67bf9945eb2
font_01_sfnt_off000139ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15206 10556 bytes
SHA-256: ac0102b157a3e4a58629efe344d7dda6cdd74916882eafb897cf34a9964d775b

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