Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c519d5bedc3ab80…

MALICIOUS

PDF

90.1 KB Created: 2021-08-06 21:31:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ad9086fc262d69e59826174095a0cd17 SHA-1: 68354ece6e5171ec4958e83f5978bd879be77da3 SHA-256: 2c519d5bedc3ab80af328ef0c44c89ce6c6f2dc446191c450111c7f6db72ab8a
176 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains numerous embedded URIs pointing to compromised WordPress sites and disposable hosting, functioning as a link farm. The primary purpose appears to be directing users to external malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://garglob.ru/uplcv?utm_term=how+long+do+solar+power+banks+take+to+charge PDF link annotation
    • http://autoshiftbid.com/fckeditor/userfiles/file/71838595016.pdfIn PDF document text
    • http://nb111.store/web/images/ckfinder/files/20210610171542.pdfIn PDF document text
    • https://digireg.ch/upload/3625436758.pdfIn PDF document text
    • https://trellisdundee.com/wp-content/plugins/super-forms/uploads/php/files/85941e1cbabb15606e518490afefec35/bexifowibadoxomaxoveb.pdfIn PDF document text
    • https://clinicscrm.com/img/files/kumobagidadi.pdfIn PDF document text
    • http://afslab.asia/upload/files/bokokijitagu.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607da2149fbff---82739502655.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082483549ad0---4562144976.pdfIn PDF document text
    • http://kondicionery-elektrostal.ru/upload_picture/file/90123173775.pdfIn PDF document text
    • https://airshow-bg.com/file/35532877403.pdfIn PDF document text
    • http://packamate.com/userfiles/radagiruzudeboxo.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/7fvqvklnis9s2i4lpgo8lrmdmq/37710456953.pdfIn PDF document text
    • http://caryhigh1987.com/clients/41333/File/98574239990.pdfIn PDF document text
    • https://lasanisports.com/files/bezezazol.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a009d04e949---53312450038.pdfIn PDF document text
    • http://fotomil.pl/ckfinder/userfiles/files/vawejevavodaxaforawonusom.pdfIn PDF document text
    • http://toonesk.com/upload/rifawazudebomeju.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/lhtongpuu55d2957q25jdr16d3/81726611786.pdfIn PDF document text
    • https://maturana.cl/upload/file/joragura.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607279cade1a4---41296020195.pdfPDF link annotation
    • http://rebeccafantarchitetto.it/userfiles/files/xatedat.pdfIn PDF document text
    • http://highlandcougars83.com/clients/2/26/268573c5102cd00412bac87cee9346ec/File/37047542800.pdfIn PDF document text
    • http://alliance-vietnam.com/upload/files/zuxokedakupufowire.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC53 16944 bytes
SHA-256: b82eb51faa1ad793cd0c9abe78cd727ce46a2f3e9efa5a48e647346ce9f8d159
font_01_sfnt_off00012859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12859 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14070 11008 bytes
SHA-256: ca5ca0ccab8d9b6250b1801666005c17ec33054066870d3915a55248c8368460