Malicious PDF — malware analysis report

Static analysis result for SHA-256 2af1a60792236134…

MALICIOUS

PDF

83.8 KB Created: 2021-08-14 09:33:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: dfcbe2c5af8414d7abb7eb2b89250922 SHA-1: e08d95720594ccf3432684c15064174e40578197 SHA-256: 2af1a60792236134e74f70db3740bb1d1a18c5de8f83b5eeb6ccc0a994f11fd6
156 Risk Score

Malware Insights

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

The PDF contains numerous links to other PDF files hosted on compromised websites and disposable domains, indicating a link farm or phishing campaign. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution through these linked documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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://harchovyk.com/userfiles/file/dazarelodizejafotozamo.pdf In PDF document text
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/160783621341cb---febemuvitunowelomab.pdfIn PDF document text
    • https://pharmawell.eu/ckfinder/userfiles/files/sowofekumesetufawaxewa.pdfIn PDF document text
    • http://malovanesklomh.cz/images/file/67509710132.pdfIn PDF document text
    • http://vitali-schulz-eiskunstlaufen.de/userfiles/files/83591934809.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/udp16ar4n72hl2u4jg68bhv3up/49766389785.pdfIn PDF document text
    • http://hit-air.pro/ckfinder/userfiles/files/dabekikorejojoxisesoxof.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/1383eaf159325273bf63015af6fbe36a/73339760530.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/riropuzofezurabu.pdfIn PDF document text
    • http://feriaalainversa.com/uploaded/files/wasedurevedarusoralu.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608dc0e07b6d9---gogedegasatali.pdfIn PDF document text
    • https://tagoproperties.com/ckfinder/userfiles/files/92705813944.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/3eb357d5415ec2e4e1cbe57fc2a8abbf/lopukijuxa.pdfIn PDF document text
    • https://grnca.org/img/files/files/84359911017.pdfIn PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/djsldb4lrdetq6t8ahcs4pu2dt/19230032482.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/1673ecfb6e9b953db7c8685418d3a22a/29038192682.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/49783798095.pdfIn PDF document text
    • https://www.bnbtravels.com/ckfinder/userfiles/files/pawanil.pdfIn PDF document text
    • https://jnvhardoi.org/ckfinder/userfiles/files/8340515286.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/5ic9kv9pug6i36l4jllmlrnqjd/60573684145.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160983dd4b272a---nigapevero.pdfIn PDF document text
    • https://balaji-technology.com/userfiles/file/77375233727.pdfIn PDF document text
    • https://orangerun.re/photo/files/91153620951.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084c156248f1---likoremegima.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606da2041c55d---gokemevefolovifazigawizen.pdfIn PDF document text
    • http://playitdirect.ca/ckfinder/uploadfiles/files/38621033947.pdfIn PDF document text
    • http://xn--knstlerische-biografie-arbeit-lbd.ch/userfiles/files/tageda.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=vertige+de+l%27amour+paroles+et+accordsPDF 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_off0000dedd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEDD 18628 bytes
SHA-256: 818e7619df9ab74827c29730547da54b90fbf82c90a9799a2694fad76fd09641
font_01_sfnt_off00010d50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D50 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12567 10856 bytes
SHA-256: 56fb1595d917910113d462d096d3f1a4e64588c50fef64638f387d82fbf4542a