Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eb09efe1e3c6b6f…

MALICIOUS

PDF

69.6 KB Created: 2021-09-24 16:54:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f3627105bd8dedcd989ecad114e94613 SHA-1: eac2df045f2b517599f41098656f629df70406b0 SHA-256: 7eb09efe1e3c6b6f7a399b548ba4de2bfda20a855cdecdbcd4c6e51ee86078ed
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-only content and embedded action trigger, typical of a screenshot used to hide clickable links. Multiple heuristics indicate a link farm hosted on compromised or disposable domains, suggesting an attempt to redirect users to malicious content. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://garglob.ru/uplcv?utm_term=ps4+controller+android+mapping PDF link annotation
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/0319f4ad2c7eaf31c4794b71a61549d2/51395005857.pdfIn PDF document text
    • http://i-harmonics.com/upload/files/73784624428.pdfIn PDF document text
    • https://gcr.goldcrownresort.com/magazine_files/files/bikokixagelisedop.pdfIn PDF document text
    • https://dom4m.com/userfiles/files/40730491537.pdfIn PDF document text
    • http://gptools.net/userfiles/file/pofitidemunak.pdfIn PDF document text
    • http://surinmajestic.com/phya/ckfinder/userfiles/files/53691743840.pdfIn PDF document text
    • https://nasco-ye.com/uploads/file/84812290848.pdfIn PDF document text
    • https://xn----8sbcehyodmtf1czh.xn--p1ai/userfiles/file/51094465444.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1612ed676645c4---50274152356.pdfIn PDF document text
    • http://anpharma.net/upload/files/30897550074.pdfIn PDF document text
    • http://tcihk.com/userfiles/76021048430.pdfIn PDF document text
    • https://ijmscr.com/ckfinder/userfiles/files/rovopigojekigazinonero.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/kumowagalixorukabusev.pdfIn PDF document text
    • https://mcq-exambd.bdbabymart.com/app/webroot/ckfinder/userfiles/files/89435572484.pdfIn PDF document text
    • http://gonganmi.com/userfiles/file/86048381778.pdfIn PDF document text
    • http://thementalhealthadvocates.org/files/userfiles/file/tagexekodewodawideliruw.pdfIn PDF document text
    • http://kasaitogo.com/uploads/files/vimobeliwaj.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/ep385t252isgoru7ul027bhor7/41280590823.pdfIn PDF document text
    • http://punaide.com/userfiles/files/wanavovabir.pdfIn PDF document text
    • http://balletpanov.com/uploads/files/74554720265.pdfIn PDF document text
    • http://studioaba.net/userfiles/files/52356088266.pdfIn PDF document text
    • http://acsalma.hu/userfiles/files/tevugipatatugefupupune.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613c227aa3cbb---wabifagugivejizu.pdfIn PDF document text
    • https://culturasiapamplona.com/guiarte_userfiles/files/70524450834.pdfIn PDF document text
    • http://alexandersorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/12741186196.pdfIn PDF document text
    • http://saigonford3s.com/uploads/2021-09-12/images/files/meguboju.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_off0000b3c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3C8 14180 bytes
SHA-256: cf98c578aeb9e1571c09763ade6009cccbb95129a852e52e9597302d90b52e60
font_01_sfnt_off0000d6f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ef0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0E 10936 bytes
SHA-256: 67181a3202472c71ede056452390f7aa19a0d45b6e90e3791b8ff09c3aac8a77

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