Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca1b98d66f3b4526…

MALICIOUS

PDF

94.1 KB Created: 2021-09-02 10:31:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2dcea211a3ad03134ff7f39e77bfd472 SHA-1: 602ef74635f861bd417cf780a4574491d945e7f1 SHA-256: ca1b98d66f3b452634490bf4be3435bf4d1730722b47b454dddebceb81ab6725
164 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of malware. The heuristics indicate it functions as a link farm, directing users to various compromised or disposable hosting sites, likely to download further malicious content. The presence of 'SE_INVOICE_LURE' suggests a social engineering tactic to trick the user into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9876

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://widepolymers.com/userfiles/file/38919135292.pdf In PDF document text
    • https://licorne-hotel-restaurant.com/userfiles/file/zigipidurazekaworesaxew.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/84233721432.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/kepurov.pdfIn PDF document text
    • http://bomtvplus.com/data/board/file/20210526173211.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe3e42c269---28336373686.pdfIn PDF document text
    • https://claudiodituri.it/uploads/53126547856.pdfIn PDF document text
    • http://sreema.org/FCKeditor/file/gamitagoduzavudofoj.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16076e4a3797ad---42511980999.pdfIn PDF document text
    • http://tdsns.ru/userfiles/file/solerabonijexevitafaxu.pdfIn PDF document text
    • https://aravlicraft.com/cmsCart//upload/file/75295954559.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/a940564f7af164bb9099447db2e016a9/73062972390.pdfIn PDF document text
    • https://delaneyllc.cfonewsletter.com/ckfinder/userfiles/files/25481930820.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160dcbd55bc221---39833809860.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608afbbd853f2---supulujumede.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160986a23e4012---pepapakagab.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160fbac7bf102c---53285266224.pdfIn PDF document text
    • http://stepasidemedical.com/images/uploads/file/34594283141.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/4f7854940a01f15c3b269861f022fdf9/19573461571.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/nokuk.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a66a214cd96---24984506885.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/3783f9833b20440b82f2df8364e88783/90236175840.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/f0839d8dac63ac66a69a395c5877482a/vaduzovagemebizit.pdfIn PDF document text
    • https://telewebmarketing.com/FCKeditor/file/46623594792.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8b9dd3d4c5---pasegadununixirudumezibim.pdfIn PDF document text
    • http://expertsystemgroup.com/file_media/file_image/file/janatamafa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=child+hoarse+voice+no+other+symptomsPDF 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_off00010807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10807 18480 bytes
SHA-256: 7c4bd47aa40787efd536f9abcafec63797d023ce4206fcac347cfc439aefc2f6
font_01_sfnt_off000137a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137A9 10988 bytes
SHA-256: acb988f9eadf2ef442f8167ea06f17724e2c318f7a1d2367005607eadea9aaef
font_02_sfnt_off00015108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15108 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.