Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9a2fbb15d75f97e…

MALICIOUS

PDF

90.7 KB Created: 2021-09-21 14:21:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: d1dd0228022d98e33533377f4eed9b1e SHA-1: 0e6d0235c4d7686a4c545d8da5f52967977975db SHA-256: d9a2fbb15d75f97e7be8093565adea97523757e4f3550b8f5bc3f38ebb2543c8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting a link farm designed to distribute malware or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the structure and URL findings are consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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 http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161409e84ef252---98922613412.pdf In PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/713dc145900e856367bcf85c6002123a/12660717821.pdfIn PDF document text
    • https://djecijagarderoba.me/userfiles/file/27137101468.pdfIn PDF document text
    • http://h-st.nl/bestanden/files/detijatigexafarola.pdfIn PDF document text
    • http://hitechdentalhouston.com/uploads/files/26828122214.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/pivaxogasowug.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/38igcrkhlaut2qg22dti2ip2b5/barebefamuk.pdfIn PDF document text
    • http://mientrungland.net/uploads/image/files/tedofu.pdfIn PDF document text
    • http://vhz.cz/user-files/19740233612.pdfIn PDF document text
    • https://tierlistei.ch/downloads/mevamoliwokezuj.pdfIn PDF document text
    • https://opescom-store.com/uploads/FCK_files/file/7663588252.pdfIn PDF document text
    • http://nutronicltd.com/userfiles/file/vojotijaxafovedusonu.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16137d3af95bb0---3671365397.pdfIn PDF document text
    • http://olsztyntransportmedyczny.pl/userfiles/file/29423723931.pdfIn PDF document text
    • http://daiichihr.com/uploads/news_file/78544233052.pdfIn PDF document text
    • https://foodsafebox.com/ckfinder/userfiles/files/65878336277.pdfIn PDF document text
    • https://777mto.info/contents/files/kufomugasorujizabana.pdfIn PDF document text
    • https://baobiachau.com/luutru/files/94789361716.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/loguwemerit.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/16143b00e4703b---363702746.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/1614526c708cd8---fekubikofekezafum.pdfIn PDF document text
    • https://investir-petroleo.pt/ckfinder/userfiles/files/64899649227.pdfIn PDF document text
    • http://thaimassageboy.com/ckfinder/userfiles/files/87429102337.pdfIn PDF document text
    • https://www.aaptuk.org/ckfinder/userfiles/files/74092865434.pdfIn PDF document text
    • http://wdnederland.nl/file/nirewobavukozokipex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=pokemon+emerald+kaizo+emulatorPDF 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_off0000fa27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA27 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001123e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1123E 10496 bytes
SHA-256: ecf52b60d7eac97fb45bfee583b5a2b5872d2b93e809ec34c285e1133cd0c01d
font_02_sfnt_off00012a0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A0D 18896 bytes
SHA-256: 37b83cc68672cf478a439170e6e6f503f3ad2a6a388bc4ccddc4e38ab606eaea

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