Malicious PDF — malware analysis report

Static analysis result for SHA-256 be9e92a972fc6a9a…

MALICIOUS

PDF

80.7 KB Created: 2021-09-07 08:08:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5b70335d93e24f55a00bc37355dc6946 SHA-1: 398761759e5cbdf1fe14cdcae03000921236a93e SHA-256: be9e92a972fc6a9ac55545b644df8e9716305e5f63f93a262dac9ea79be233c4
196 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to compromised websites, suggesting a phishing or social engineering lure. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway security. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/6b1f01f96f0c372d63faec5cb654135b/zarezo.pdf In PDF document text
    • https://jjcfurnituremaker.com/userfiles/files/48139164261.pdfIn PDF document text
    • http://tutaylamhet.com/storage/ckfinder/files/99496343036.pdfIn PDF document text
    • http://themadthinker.com/temp/vinney/HTML/userfiles/file/38309763843.pdfIn PDF document text
    • http://huron81reunion.com/clients/f/fe/feec28e48c841af8be4ad6373737a022/File/gurolererizofepewoduru.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/323b320bbf8b22a671c46b42f224b083/14635853250.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1607da233585a3---14040642081.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c918e607a6b---kumasibesagalokunofutikef.pdfIn PDF document text
    • http://ypperfect.com/ckfinder/userfiles/files/18663059684.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/wumatuwotiniburenesomuxas.pdfIn PDF document text
    • http://jiangsutravel.kr/userfiles/files/20210714_000625.pdfIn PDF document text
    • https://bancodevida.com/bancodevida/admin/images/image/file/dujuvinenerisilekesarogim.pdfIn PDF document text
    • http://short-story.ru/upload/file/kopadulepozorun.pdfIn PDF document text
    • http://schokofontaenen.de/idata/dudejoxaxeju.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/0f011062dfa34e7549b8211e97b30333/xulojubazivamebakupabefij.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/elbdmc6iv954jefg5895e8gbjf/48325053707.pdfIn PDF document text
    • https://oncallanatomist.org/ckfinder/userfiles/files/49676760717.pdfIn PDF document text
    • https://moolans.com/uploads/files/dobukosadepugadod.pdfIn PDF document text
    • https://bestofbucerias.com/upload/file/44535205388.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160afc58f0b1a1---lenokusetisigupon.pdfIn PDF document text
    • http://technoculture.cz/admin/upload/file/gezigeneratesijaxipob.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4ddea03782---544470143.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/3afeba5dda0925daec32d39808abe3a2/tavagategalebesesawinuwif.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac35d4c08b5---gemok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=extracting+pages+from+a+password+protected+pdfPDF 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_off0000d678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD678 17440 bytes
SHA-256: 19ae79de95a7db8ee31864db23711aa4e9c59befaf530f4966889d40c8631280
font_01_sfnt_off0001035d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B74 11088 bytes
SHA-256: c24fa6d37d3487c36475eeb00cf74c2283e901d43ca21fc76a0355a98f04eae1

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