Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5dd30e991d6dafe…

MALICIOUS

PDF

118.7 KB Created: 2021-10-11 11:27:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 026af65e7ec08660770ed83c8a3bb4d6 SHA-1: 930a6721369c899c96f9d4b6d6d918468525dc1f SHA-256: f5dd30e991d6dafe40159ee955a483662605494b2f3c1f9a17e21cc7c8bf1109
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised WordPress upload storage, suggesting an attempt to distribute malicious content or phish credentials. The document body was unreadable, but the presence of numerous unknown URLs and the link farm heuristic strongly indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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 http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16142d8390bdf6---najatawefakipozaluz.pdf In PDF document text
    • https://onlineadda.organicemall.com/ckfinder/userfiles/files/vopaxavamivunetidixulikuk.pdfIn PDF document text
    • https://www.sistemkabin.com/ckfinder/userfiles/files/46661933887.pdfIn PDF document text
    • http://ilovestory.com/upload/file/beveduweb.pdfIn PDF document text
    • http://domuran.pl/files/file/64404891602.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/be22054dcb034e78073bb04a731bd482/menaxitomewabubuf.pdfIn PDF document text
    • http://chipgene.com/image/files/20210924_102359.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613744ab5900c---lezixaraf.pdfIn PDF document text
    • http://bkht.vn/userfiles/file/57656766187.pdfIn PDF document text
    • http://pate4me.com/userfiles/file/luvil.pdfIn PDF document text
    • https://rtaadmin.mrv-educationservices.com/content_file/files/rezoj.pdfIn PDF document text
    • http://nawoo.net/userData/board/file/sitowiferalajo.pdfIn PDF document text
    • http://tropo-design.com/ckfinder/userfiles/files/deputinerajelotalit.pdfIn PDF document text
    • https://www.playitdirect.ca/ckfinder/uploadfiles/files/bezapaziruzekisetu.pdfIn PDF document text
    • http://pro-group.ru/userfiles/files/towivinaw.pdfIn PDF document text
    • https://seedcambodia.org/htdocs/cljr/data/files/20719482690.pdfIn PDF document text
    • http://avvocatogiuliani.it/userfiles/files/62910051710.pdfIn PDF document text
    • http://kxqcgs.net/filespath/files/20211011102640.pdfIn PDF document text
    • http://xn--brneneskontor-landsforening-b0c.dk/userfiles/file/mafidilubivebutolozebar.pdfIn PDF document text
    • http://husplaza.hu/editor_up/15759554926.pdfIn PDF document text
    • http://dblbtech.com/userfiles/file/wabulomadiruzobijese.pdfIn PDF document text
    • https://client-sms.com/ckfinder/userfiles/files/37935719071.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea3c2cb5cd---46019167488.pdfIn PDF document text
    • http://cautrucpalang.vn/webroot/img/files/17014968148.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/35833442089.pdfIn PDF document text
    • http://cosmikkino.ru/sadm_files/pavitujiguk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=what+do+woolly+worms+eatPDF 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_off00016056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16056 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001786d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1786D 10508 bytes
SHA-256: 268017a2c5ce0ed449ca1c50be6be09913ac36b5e46140e9254f69dd326649e8
font_02_sfnt_off00019075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19075 23152 bytes
SHA-256: da6910cd46b3f8a4335bf080521535439222b4b1491ea2646ec67500749277b5