Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa0a849552f3b229…

MALICIOUS

PDF

81.2 KB Created: 2021-09-02 23:45:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 22adf62c040062cbbf70fd0212efc060 SHA-1: 730ef88a5923a3c821b1f79db611463c87ef6f97 SHA-256: fa0a849552f3b229950fb8a35efda70c8e4c86efd20b1d535d4dd462093a6838
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites and disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or redirection to malware. The file's structure and URL patterns suggest it's designed to lure users into clicking links that lead to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/t1kuaj2bog5kioqtv7f06nf4gq/basip.pdf In PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160774ddb853c9---64450977820.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ec06a1229b---lekugepimazi.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/nokiputileleriwexawesixef.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1610df16c21142---58640338606.pdfIn PDF document text
    • http://maihome.hu/admin1/file/jeninizagofafojafume.pdfIn PDF document text
    • https://masihpt1.com/contents//files/japunedixapuwejiditude.pdfIn PDF document text
    • https://bestrecycledautoparts.net/images_i/file/81176522056.pdfIn PDF document text
    • http://studiogiamberardino.it/userfiles/files/93190284393.pdfIn PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/7b14be20c765fccd63dded18a1a8d1f1/79747100450.pdfIn PDF document text
    • http://jandebruijn.com/uploadimages/files/wasuwavatujeliwopoxe.pdfIn PDF document text
    • https://thefencedocumentary.com/adminfiles/file/vefosikorofamufu.pdfIn PDF document text
    • http://fipjp.com/userfiles/file/56146360980.pdfIn PDF document text
    • http://coronado1977.com/clients/54390/File/14599012688.pdfIn PDF document text
    • https://8cj2aja7-8mxb.com/contents/files/pegijenusotitokov.pdfIn PDF document text
    • https://residenciasanamaro.es/userfiles/files/zunevabukimisu.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6504f33ab---80473336577.pdfIn PDF document text
    • http://homeopathyhongkong.org/files/mepumadutafawisurizalemak.pdfIn PDF document text
    • https://posaonakosovu.com/ckfinder/userfiles/files/gakevoxezidijuf.pdfIn PDF document text
    • http://illinoislivestock.org/userfiles/file/rulatawowemijifenesev.pdfIn PDF document text
    • https://nezrenweb.com/calisma2/files/uploads/84808249572.pdfIn PDF document text
    • http://roanfamily.net/clients/0/01/01b24a6c100194bbc8678883f3cd4a53/File/36771781032.pdfIn PDF document text
    • http://uptownherndon.com/uploads/files/21044103256.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608034abb517b---bekopufoxofesux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=accounting+ratios+class+12+all+formulas+pdfPDF 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_off0000d93b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD93B 16900 bytes
SHA-256: 1bbabcedfe2b69e94a15f75a03b174fece72ab4a180972ec6075671069daf9dc
font_01_sfnt_off000104fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104FB 11084 bytes
SHA-256: 8d66cbbf5b81adb77fae6060ebf982dbac91e51c67be308fa1c7a49503d19fcf
font_02_sfnt_off00011ebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EBE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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