Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ab2c415b607772b…

MALICIOUS

PDF

85.0 KB Created: 2021-07-22 13:02:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 7c94c9b8b075c61b28e7a4a576f7755c SHA-1: 8c592c9cfabb127c3e797c44f47c3f148a5174b7 SHA-256: 6ab2c415b607772bc6917c3ca20e078eaf209971607e30947068db0ce89f1922
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 CMS upload directories or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/4adf17c391e7aca8751fa588501cdc52/67008386897.pdf In PDF document text
    • https://ocbond.org/userfiles/files/12688068170.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071baad12dd5---86019311772.pdfIn PDF document text
    • http://www.depomatrial.com/file/37834579729.pdfIn PDF document text
    • https://oncallanatomist.org/ckfinder/userfiles/files/83574861062.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf2954a757c---genegarojexezerobuwon.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/95170906851.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b246824e978---59763663622.pdfIn PDF document text
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/be2617f00845bed50c2d4e420fc77b0c/63798224336.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160911d5fc3d17---38107892270.pdfIn PDF document text
    • http://maraulsan.com/ckfinder/userfiles/files/kimuwaririr.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609478696d150---vitutibofiw.pdfIn PDF document text
    • https://freshchannels.com/home/sites/freshchannels/public_html/ckfinder/userfiles/files/fukemudirezokegazulenaja.pdfIn PDF document text
    • http://synthecinter.com/userfiles/files/dutabid.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/0fe9bc3043392fe7dec00bf15ef65748/15762127847.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b45dea04999---bisoraluxoxeda.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/7fd354faf04a95f97991011e28b403f2/93257054021.pdfIn PDF document text
    • http://donkaew-furniture.com/ckfinder/userfiles/files/94522257931.pdfIn PDF document text
    • http://hillsdalehorseboarding.com/ckfinder/userfiles/files/13470666578.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/13129420130.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/pawaxaxisiza.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16081c200b812a---porovefejopavelumolupu.pdfIn PDF document text
    • https://pk-kuepfer.ch/ckfinder/userfiles/files/81214135887.pdfIn PDF document text
    • http://industrialsupplies.pk/userfiles/files/pixifo.pdfIn PDF document text
    • https://natyabio.com/uploadfiles/koxowozulojuzowaxowis.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=how+deep+the+father%27s+love+for+us+wordsPDF 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_off0000e6d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D3 17924 bytes
SHA-256: 2a87b2d11d9735122c232704173fef22ac9e615a7561b7a7667cd08c41c806d8
font_01_sfnt_off00011590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11590 10676 bytes
SHA-256: b707fe2e50925ba2a8b8cb5dde04293a046cb9974fede6ee138cd49bcab3145b
font_02_sfnt_off00012e4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E4A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1