Malicious PDF — malware analysis report

Static analysis result for SHA-256 e062e25470e4f879…

MALICIOUS

PDF

107.6 KB Created: 2021-06-29 20:57:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: f7d58f12386bddf5b35fc2a239ebb481 SHA-1: 7fdc76482d30fa864e5276ee0fe6ee6168215256 SHA-256: e062e25470e4f879b6ec4119138055145b9d507e99a44721c330221e0fd98eff
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to compromised WordPress sites and disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, so the primary attack vector appears to be social engineering via malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9882

Heuristics 6

  • 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.
  • 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://coretry.ru/uplcv?utm_term=kenneth+lam+barrister PDF link annotation
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c584a3f1490---gaveb.pdfIn PDF document text
    • http://ambvet-trefontane.eu/userfiles/files/boxukizuwebi.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7b55d4fdf---65398478465.pdfIn PDF document text
    • http://comp-art.ru/userfiles/file/gefexesixofijiwazubufeliz.pdfIn PDF document text
    • http://the-bom.kr/upfile/files/82529144777.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/4ff44ed0349d3d80e9c45d86db138ef1/99404966796.pdfIn PDF document text
    • https://tavio.ru/files/file/39977649848.pdfIn PDF document text
    • http://airsoft1.ro/files/file/dibuledunabisa.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/92c15f5454bdd42e0ba3bfa730b1d32a/38707920246.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/27ea495d71b680882eb3cbdbd932dc21/sigufuvonefo.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073e95400c0f---pirazezuxazefowefabe.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bdc84542a9d---josapopubifanulubevujejap.pdfIn PDF document text
    • http://gistfamilyreunion.com/clients/8/8c/8cbf0a40baaab9dd4734ff2cdbb1e120/File/75862837384.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2ce539f64---30644552388.pdfIn PDF document text
    • http://sghscsjamarai.org/guruhargobind/userfiles/file/lubigusosu.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/93psm38mqerpobrj112hdimkco/28981739554.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/6aa373e7002c4896669ef169b0485765/24390670149.pdfIn PDF document text
    • https://lensprovn.com/ckfinder/userfiles/files/78996008769.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b3b836eb0---36960880550.pdfIn PDF document text
    • https://mcq-exambd.com/app/webroot/ckfinder/userfiles/files/salumajiwolomewanugagiw.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607a638fabf47---vafidavofitop.pdfIn PDF document text
    • https://werbemittelag.ch/upload/file/nomapuzadefodikarukolud.pdfIn PDF document text
    • https://abyway.lv/images/ck_images/files/vibifozuwiliguvegidi.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C1 17608 bytes
SHA-256: 0f3eaf8a68aba1272d11d957b838a5992efc4e0cb6fdcdbf41b8f5068596ee43
font_01_sfnt_off00012f8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F8B 10384 bytes
SHA-256: e6b5a52c974cc4c1405fbcc0be64cf4c9a4320126de17a065961f5325f055960
font_02_sfnt_off000146c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00015ed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15ED5 23916 bytes
SHA-256: e5529137135eb14a8cfe079ef2062ff3883bf860d878c28b67db028d068242c8

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