Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f0c9bc7f5c24bd4…

MALICIOUS

PDF

102.3 KB Created: 2021-08-07 13:26:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: aac1769a81e518373eba149d636c9466 SHA-1: 06102c91bf2e5561a0d18724f09eb5ea5c58f451 SHA-256: 2f0c9bc7f5c24bd49614642305f549107df8ae5cf50ac5e7fb7ab2357f765039
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to manipulate search engine results or direct users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://belhasasecurity.com/userfiles/file/77958778721.pdf In PDF document text
    • http://thegioimercedes.com/upload/files/luwoxigebipilelapubu.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096c0c49b859---direxub.pdfIn PDF document text
    • http://tweedehandswikkelaar.nl/app/webroot/files/userfiles/files/52024400098.pdfIn PDF document text
    • http://sibleyestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nexabesok.pdfIn PDF document text
    • http://asremajazi.com/uploads/files/fobijomawunatexanaxezele.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/7b5ab6affaebec3431c3f285de93b8ae/82956068116.pdfIn PDF document text
    • http://homespakistan.net/magzine/uploadfiles/file/waduvarawimeritufatoboru.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a181aaabf85---dutilizi.pdfIn PDF document text
    • https://n-zvuk.ru/upload/file/85672661427.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2800b250e5---fivimimili.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/puvix.pdfIn PDF document text
    • http://rocb-ap.org/file_media/file_image/file/44522763354.pdfIn PDF document text
    • http://thietbiotovn.com/Images_upload/files/fufamaxobip.pdfIn PDF document text
    • http://blatt-gruen.ch/files/16003079646.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/konodetew.pdfIn PDF document text
    • http://interel-rus.ru/test/sites/default/files/file/zususatagus.pdfIn PDF document text
    • http://hccc252.ca/clients/e/e4/e484b38507f190a955b66748903449e1/File/57797895670.pdfIn PDF document text
    • http://drjoecarver.com/clients/49355/File/ranafexiz.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/070bdcb0810d66234ffaaac15c077e99/ferofedamalo.pdfIn PDF document text
    • https://bushregenerators.biz/userfiles/files/65589347334.pdfIn PDF document text
    • http://extracam.es/app/webroot/arxius/file/zogowilu.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160738d0eb61cb---81497432829.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/c2b3a84ecd434d69238b425ad411b19d/20859007046.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+get+world+edit+in+single+playerPDF 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_off00012bd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BD2 17472 bytes
SHA-256: 824f3a97233d421a1ed0ea22a27471c2c828a8e35ce58e3c2e7808cdcd48330a
font_01_sfnt_off00015958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15958 10756 bytes
SHA-256: 643a142cdd5de99d431a06e806180d0efc28e3df725ae9380445e8c6e94cdaa6
font_02_sfnt_off00017200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17200 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1