Malicious PDF — malware analysis report

Static analysis result for SHA-256 6be66d18f26627da…

MALICIOUS

PDF

77.7 KB Created: 2021-08-02 21:37:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: edda7e4639103bb3c7b9eea96704be09 SHA-1: 6be99b2dd07aeee2b97d8f24afef928e5c57fce1 SHA-256: 6be66d18f26627dad05e0cc8050dbe5e6ab8637b69971a4d2452dfb0e3d61688
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and is identified as a link farm, likely intended to direct users to malicious websites for phishing or malware downloads. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious document, potentially leveraging embedded JavaScript for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 https://ketchas.ru/uplcv?utm_term=pokemon+ash+red+gba+download PDF link annotation
    • http://woori-tour.kr/FileData/ckfinder/files/20210710_0A2FADAFEC7142ED.pdfIn PDF document text
    • https://bhiringisamsankalimandir.org/ckfinder/userfiles/files/kodanuzumajeti.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/42eadcf95df09cc3267f84d5b4626a2c/70347044008.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2b152e89e---94696790997.pdfIn PDF document text
    • http://kancelaria-perfect.pl/app/webroot/media/files/delabe.pdfIn PDF document text
    • https://ms01bet.com/contents//files/vasawopurelobokewitowija.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/2d0ed7aa78b70f26d3175f335a7f78e0/60144810128.pdfIn PDF document text
    • http://feniks9.ru/ckfinder/userfiles/files/jufibutexud.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/b70fdd2ef33a137fdded2c4e7897ee84/dowanodedalebuwazi.pdfIn PDF document text
    • http://cjmjwarrickhudsonfamilyreunion.com/clients/9/9b/9be434dcd9982d5451de1b36a82eb828/File/xalexinul.pdfIn PDF document text
    • http://martonelektro.hu/files/file/jisisufiluberofotox.pdfIn PDF document text
    • http://tsrmvolontari.it/userfiles/files/60411111813.pdfIn PDF document text
    • https://amd-export.com/site/upload/file/86876908435.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a9206d37f27---47048505990.pdfIn PDF document text
    • https://cottonweb.net/userfiles/file/fokupogerukenobazuduje.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/69146581148.pdfIn PDF document text
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/2a2k51q9g3rdbt850ktk56ibhd/gapeloxelofafejikowuf.pdfIn PDF document text
    • http://buchtel1967.com/clients/26382/File/natupuj.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8604390d2---xikirira.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/a6e771b89460e2730e47db3279a7225e/bupumenozalimukev.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/17256264271.pdfIn PDF document text
    • http://fashionflutters.com/ckfinder/userfiles/files/gawejofifilopivuvi.pdfIn PDF document text
    • http://rjbmachinery.com/d/files/dewuzepopam.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b19eae9ccc5---51322683057.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/ktdqhmminfm15garbkbpr672g6/zubaxekukekugowibilufigi.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_off0000c966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC966 16828 bytes
SHA-256: f9d7cc37ce46e00ee800987ea795c8884ebcead0bde1a060ac8abe82ae23b907
font_01_sfnt_off0000f59e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF59E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010db5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB5 10824 bytes
SHA-256: e734a346b50a6c2ba556f57ba4da6758ca10e3ec0fe1ab42408b6fa09b3570c1

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