Malicious PDF — malware analysis report

Static analysis result for SHA-256 f65d0a9152ec38d1…

MALICIOUS

PDF

88.3 KB Created: 2021-07-29 22:15:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 2f333ecd7562dbfc036de4629e825c3b SHA-1: a1e0e7a0dd76d2805ab7e133dfa7125d70ad3f29 SHA-256: f65d0a9152ec38d13755cb45de298b3f19d08b840865c4ef36aca1b463594b59
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded JavaScript and numerous links to compromised websites, suggesting it is designed to trick users into downloading malicious content. The presence of a 'download button' heuristic further supports a phishing or social engineering attack vector. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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
  • 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.
  • 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://philabc.ru/uplcv?utm_term=driver+de+audio+para+windows+xp+32+bits PDF link annotation
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e38c71e086---tarazazive.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/b90dfe7d23f8cf28df9e33e9068df3bb/96859169066.pdfIn PDF document text
    • http://goldenpeak.it/userfiles/files/20865524425.pdfIn PDF document text
    • http://aimic.com/userfiles/file/nesibupogugub.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160881849dd558---60397539630.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/8lhg392bthevafmhuggcco90h0/wavigezabonigejer.pdfIn PDF document text
    • http://www.moyekolodin.com/files/97867816425.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/bf5732ac3c9c9e6d995021d7e1889e5a/juporupasodiripemiviv.pdfIn PDF document text
    • https://rosewoodcity.org/nbloom/fckuploads/file/87176285263.pdfIn PDF document text
    • https://kurtoglumob.com/upload/file/laserabedofato.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b49d7f8112b---wovefowadopetusuneteb.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/gt7kqmttp5saofdq721326vmn3/17615787952.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607f172806d2b---tawapenuloraladowetefiwun.pdfIn PDF document text
    • http://xn--80aadq3ae7aa5k.xn--p1ai/upload/file/zilurijak.pdfIn PDF document text
    • http://ilovechardonnayhills.com/userimages/zigaziduwipudo.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0f74c8015---67560831320.pdfIn PDF document text
    • https://lawtutors.co.uk/js/ckfinder/userfiles/files/varotazewumirobak.pdfIn PDF document text
    • http://rauvuonsach.com/images/uploads/files/zavubomasikodapanavagud.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/4ljogdae972i2onur85km2dbeb/49676421573.pdfIn PDF document text
    • http://www.atccs3.it/atccs3/fckeditor/editor/ckfinder/userfiles/files/73025864352.pdfIn PDF document text
    • https://brothers-music.com/ckfinder/userfiles/files/58060229843.pdfIn PDF document text
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/lnpf0s6ogguvk2ol36m86hshao/simiwarepim.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/tabez.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609b9906a9bb4---kezijosigezewugulowim.pdfIn PDF document text
    • http://studiotecnicomancini.eu/userfiles/files/luvozonipekakiwinuju.pdfIn PDF document text
    • http://golfproradost.cz/webpagebuilder/ckfinder/userfiles/files/15070420358.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7598c51b9e---mifejag.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_off0000f295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF295 11128 bytes
SHA-256: 8d93023b1e10845f5acecdd3adefe02f728249efa9d181f668375a3ccd7b9752
font_01_sfnt_off00010ca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000124b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124B3 17432 bytes
SHA-256: 79850fb7033332ce6d7bb18bb3eebfb2025a0c9a02329584a7e6dd162967bb22

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