Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dafba4c5dd9c0d7…

MALICIOUS

PDF

206.5 KB Created: 2021-07-01 22:25:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: f7a9e7716cbdc7b5c079a1af715ee752 SHA-1: f795029fa9d041514383e5aad523f2b091778354 SHA-256: 4dafba4c5dd9c0d7854e1ba57dc1c2568b1c8f247915f12016c49c0e4f91c1c7
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged by multiple heuristics and ClamAV as malicious, specifically as a phishing or trojan delivery mechanism. It contains numerous links pointing to compromised websites and SEO redirectors, suggesting an attempt to lure users to malicious content. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9962

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://oniceh.ru/uplcv?utm_term=1+minute+dramatic+monologues+for+males PDF link annotation
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/39151f9e9bb25cc8eafec3bd2e0efbd3/wasigibiga.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160afd0705359a---52112026555.pdfIn PDF document text
    • http://af.ssla.ru/images/fornews/files/tozevavefezirorati.pdfIn PDF document text
    • http://diplomat2014.ru/ckfinder/userfiles/files/kumelafawaliwusezizego.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/4v4tndvl8ufk81t069d8ktjehn/90400792831.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607d764a753a1---jamowapajeg.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/77007965096.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/zogadurutapilajewurazo.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/201885751d68edb83fdb2b161bacde83/10484627770.pdfIn PDF document text
    • http://hotechike.com/files/files/kinilepademidenemuka.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/27558205620.pdfIn PDF document text
    • https://doanhnghiepvietnam.org/img_duhoc/files/ludegafos.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a266a39db3---8723756282.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/2fa3986edd9ebb03051903b644369048/fasolotewebonuwu.pdfIn PDF document text
    • http://qytbearing.com/upfile/file/xiwosam.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/bi5sm0rekncuvdal3mpnlnnad5/82018522877.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/55c3d295eb501fd584cdece591839174/6710912100.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/pcgf9d8953dhou2uggaob8mlah/99172352473.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_off0002c942.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C942 10876 bytes
SHA-256: cc1d02ca19643100bd903d05a79003e4345a9557579e4b782dc22f99df93706f
font_01_sfnt_off0002e223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E223 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0002fa35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FA35 18348 bytes
SHA-256: fa0c02f18fad74b97877da3a8151aeb0142b56d84effe9a61a841f17c99de80d