Malicious PDF — malware analysis report

Static analysis result for SHA-256 297792ecc2e0d8f8…

MALICIOUS

PDF

85.2 KB Created: 2021-09-06 19:50:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: b8bd23b10b3462e0faf0e1fa41c978f7 SHA-1: 1fbc98a7825b2288915a09a7723eda85838d1ec9 SHA-256: 297792ecc2e0d8f8cac98a91ad9dd6a62d9f5aa4649be74d6937711261ec9c73
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://allytemp.ru/uplcv?utm_term=funza+lushaka+bursary+application+form+2020+pdf+download PDF link annotation
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606e7e60baaa6---sixoturuwivivefadeku.pdfIn PDF document text
    • http://parfumkin.ru/files/files/88631223807.pdfIn PDF document text
    • http://pizzeriagiganti.ro/imagini_ws/kozanizizuk.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/eac24e0845d9fc06dd2964ce7dfde72e/rifirivogobemixazurato.pdfIn PDF document text
    • http://hillsdale66ersreunion.com/clients/c/c6/c679c52642bc64dd8629b98fb95ccc77/File/62769907980.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160b649279b7f5---zunatozuradokasobaxot.pdfIn PDF document text
    • http://tcgardening.com/userfiles/file/2021090207282873499.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/2073276f99898c85cd9e0abfceeb87bb/dubej.pdfIn PDF document text
    • https://maviet.vn/upload/files/jononuzotakokelewavufak.pdfIn PDF document text
    • http://ranahytta.com/ckfinder/userfiles/files/xapuzuvejul.pdfIn PDF document text
    • http://sungwoneng.com/upfile_editor/2021/files/voxapexosidujomoxo.pdfIn PDF document text
    • http://obras.ru/sites/default/files/uploads/pujopononasaripixe.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/6638578010.pdfIn PDF document text
    • http://tsuiteru66.com/userfiles/file/20839076549.pdfIn PDF document text
    • http://podiummoda.ru/userfiles/file/sabufisol.pdfIn PDF document text
    • https://edu-mate.kr/_UploadFile/Images/file/sanajeti.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/subuk.pdfIn PDF document text
    • http://biosafety.biz/ckfinder/userfiles/files/levebopofopadamepivezoron.pdfIn PDF document text
    • http://netmutum.com/userfiles/file/fijevugobitarusofi.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e2bc616199c---doliwapuzetepilebijumiw.pdfIn PDF document text
    • http://thucphamchucnangmy.vn/uploads/files/82308242282.pdfIn PDF document text
    • https://al-wesam.com/userfiles/files/78079916190.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/024f5193669ed77257cc97e093ea7689/28914070351.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e67b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE67B 11564 bytes
SHA-256: fb7366e4322e71e0a40307a08c476c8e5db79659bcd40616e95b43a107036471
font_01_sfnt_off000101a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000119ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119BA 17564 bytes
SHA-256: 4338ccb3888f8ff6e82c97169cec46b5e42a44c883d59f458ae3c77e10d5790b

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