Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbd22f33d6847940…

MALICIOUS

PDF

96.9 KB Created: 2021-08-08 13:50:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ef5dffaf8f2d66e72f8309ba881c6be5 SHA-1: 4e160b19d344d5a2fb1c0528694852a31032a16d SHA-256: dbd22f33d684794012870fa0dd5c2c33ad7489df394971354b83f4f759cea5fb
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains embedded JavaScript and numerous external links, some pointing to compromised WordPress sites and one to a raw IP address, suggesting an attempt to redirect users to malicious content or phishing pages. The presence of embedded JavaScript indicates a potential for further malicious actions beyond simple redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/6d20d1c83c7a7323bf8d0926217d43cd/pekoliwuboloxobaxeneg.pdf In PDF document text
    • https://landbar.com/upload/files/rebuve.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/03be380a19b3e0be95ffedea39ba2930/97640540202.pdfIn PDF document text
    • http://bindashnews.com/userfiles/file/wobofokexugikusif.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160c6e85559e41---voxalu.pdfIn PDF document text
    • http://abpaluso.com/upload/file/kokuxi.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/16075e88837567---46385650342.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b41c130c0ca---26402067500.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bd019a56c36---rigelemapikojijas.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-6-30/20210630205203213308.pdfIn PDF document text
    • http://travisreunion.com/clients/1/1d/1d9c560ef9ee6310b862f4c9d288d7bd/File/sefapogonikotivarugovezol.pdfIn PDF document text
    • http://morebricks.com/ckfinder/userfiles/files/gezesivonil.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/66312083789.pdfIn PDF document text
    • http://duda-tech.pl/dudatech/upload/file/97593028437.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160afefb75a678---21660069139.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc2d63a14e---80312658890.pdfIn PDF document text
    • http://innovad-ltd.com/userfiles/file/5166669791.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078fe8755184---nagenefabapewozogiwoleviw.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa7a3411d6---tusenebavaluko.pdfIn PDF document text
    • http://xn--9w3b11kh5l.com/ckupload/files/xuginofabiru.pdfIn PDF document text
    • http://127.0.0.1/bantraicay/js/ckfinder/userfiles/files/gitiweduxifafif.pdfPDF link annotation
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/5iqtoeejelhn55fbs8a3unnkvs/53340876458.pdfIn PDF document text
    • http://dioceseofniranam.org/userfiles/file/gifobizibawovisi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=digimon+world+evolution+guidePDF 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_off0001199f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1199F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000131b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131B6 10516 bytes
SHA-256: 1d8335d74750d6ef3c97978922c12504b199bc6d80560507a6642c2de2df7ee9
font_02_sfnt_off00014965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14965 17228 bytes
SHA-256: d367aeac99532aa84da59ffb1e729c2a91af30fd3e0e72db4077f6f4641d981a

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