Malicious PDF — malware analysis report

Static analysis result for SHA-256 a49f0875a244a352…

MALICIOUS

PDF

98.8 KB Created: 2021-08-15 14:52:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: fb8bca93b060f697cd43213309b0194d SHA-1: 9e7530e5792944038bce55ffe4ec5d35445c79a3 SHA-256: a49f0875a244a352e17574ab0c9ed6b6e23c1f302ca401b21cfb65f7542971dc
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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://wastran.ru/uplcv?utm_term=%D9%85%D8%A7+%D9%85%D8%B9%D9%86%D9%89+%D9%83%D9%84%D9%85%D8%A9+%D8%AF%D9%88%D8%B1%D9%8A%D8%A7%D9%86 PDF link annotation
    • http://deborahkay.com/ckfinder/userfiles/files/27044510949.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///27232218049.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/44923438289.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/9ae4897e70e8552ebc8d79e6984d071e/18341903674.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/p6gunrhk3p8ths119skt92o244/23478207688.pdfIn PDF document text
    • https://rolcsi-bau.hu/userfiles/files/sesunaxopiribajaba.pdfIn PDF document text
    • https://alteanetworks.fr/img/file/5131006147.pdfIn PDF document text
    • http://salukool.ee/upload/userfiles/file/biwafuwal.pdfIn PDF document text
    • https://suma.ca/upload/editor/file/47498526655.pdfIn PDF document text
    • http://yamamatoen-wanwan.jp/ckfinder/userfiles/files/lanirepejigamobawepiro.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160739e5809257---zuduje.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1608785cbd1cc4---57074795775.pdfIn PDF document text
    • https://mebelihome.ru/upload_picture/mubuzapawiwi.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/c22bc8c202877b2673cd05c6d3c227ee/razubikemikukol.pdfIn PDF document text
    • https://sinarwaja.com/account/files/gadudazelugexemonunoxen.pdfIn PDF document text
    • http://avonsteel.com/UserFiles/file/rotegedunowujegexikera.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160947bb6eb417---33548264496.pdfIn PDF document text
    • http://gabinetortodontyczny.eu/userfiles/file/ramenazir.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/cd68af70a69be921db9b3e418cb5bb4a/98713483727.pdfIn PDF document text
    • http://thenext.pk/userfiles/files/6896129182.pdfIn PDF document text
    • http://thienlongadv.com/upload/files/funilir.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/dde2f2f02833f9ee61a7a8eed28af8f6/33314506005.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000edaa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xEDAA 30880 bytes
SHA-256: 7ac5e90ac50a29fc562ffda62a630c3526962f2bb09c6da56ed3dc23d3e4d605
font_01_sfnt_off00012458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12458 15432 bytes
SHA-256: 7970419f9a71539e9d6765768207dbb37388dd042e772f8bbe092cb68251a7b9
font_02_sfnt_off00014b88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B88 18416 bytes
SHA-256: 9df29920988cf060cfc8b826a1940bc9e2d7d5bc4b5c6eb42b7b099308f6c3d9
font_03_sfnt_off0001694d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1694D 8984 bytes
SHA-256: 1155eef8b03fb48db8196c62fe92ea0367c3129ef5e52290f3da045cb9446085