Malicious PDF — malware analysis report

Static analysis result for SHA-256 72fe947791c36405…

MALICIOUS

PDF

83.5 KB Created: 2021-09-08 22:44:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: fc6bf51235e12755831f2ba3bda09de8 SHA-1: 02ab99ea223899037b470f4ed6f64fcedd5ef986 SHA-256: 72fe947791c3640575c889c39560eb597ef96d714948f55261db4f8537e72562
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://printific.com/images/contentimages/files/99856122856.pdf In PDF document text
    • https://hygradeinsulators.com/images/uploads/file/87736553223.pdfIn PDF document text
    • http://ccsctda.com/ckfinder/userfiles/files/20210907_100725.pdfIn PDF document text
    • http://cgmorenanews.com.br/ckfinder/userfiles/files/72949186744.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/bikus.pdfIn PDF document text
    • https://wyslijpaczki.pl/app/webroot/files/userfiles/file/47765051645.pdfIn PDF document text
    • https://ph2020.org/FCKeditor/file/88593586464.pdfIn PDF document text
    • https://albawadiroad.com/userfiles/files/wafepalosutamamapazimet.pdfIn PDF document text
    • http://montpellier-businessplan.fr/mbp/upload/images/images/upload/ckfinder/342062599.pdfIn PDF document text
    • http://yuilchem.com/userData/board/file/39715218517.pdfIn PDF document text
    • http://indecomavo.pl/userimg/inc/makutejodutobap.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/45585666485.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/08d0db3ce5b29eb70b4557283c23162a/41900928068.pdfIn PDF document text
    • http://joyearland.com/ckfinder/userfiles/files/gesotasab.pdfIn PDF document text
    • http://xn--eyt274i.com/upload/files/31086774658.pdfIn PDF document text
    • https://toolsatool.com/userfiles/files/tabepefufude.pdfIn PDF document text
    • https://www.zolmedis.lt/ckfinder/userfiles/files/lujoveduwabezotunav.pdfIn PDF document text
    • http://hatowo.com/app/webroot/uploads/files/mopofofumugigijim.pdfIn PDF document text
    • http://hidropro.hu/upload/gadijikolofigokixogegoj.pdfIn PDF document text
    • http://hondaototanan.com/upload/files/nefebu.pdfIn PDF document text
    • https://jogamiskolc.hu/ckfinder/userfiles/files/filasode.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=samsung+galaxy+s2+sprint+sim+cardPDF 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

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_off0000dfe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f7f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F2 17872 bytes
SHA-256: aba316ce0f4d0bf704971823515b62fd8231ac5fd57a21b15dd9576fd18ad7a4
font_02_sfnt_off000126a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126A8 11116 bytes
SHA-256: 65d64b4199def059ec73bcc3df99a55ced22e80248217d901c755ad40843bd44

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