Malicious PDF — malware analysis report

Static analysis result for SHA-256 064a2465b4577194…

MALICIOUS

PDF

84.3 KB Created: 2021-09-16 07:56:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c9c72ffcafbfd308e372fb04068b2a38 SHA-1: e360acbe607bc69ce29e62f845815b8ee17cc70f SHA-256: 064a2465b4577194341b28e123aef498ef764dfb8df9c08280cfb40eda1b5557
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external URIs and link farms, many hosted on disposable or compromised domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://allytemp.ru/uplcv?utm_term=play+store+apk+app PDF link annotation
    • http://defhjdr.friend-match.com/upload/files/94094807154.pdfIn PDF document text
    • http://evrokomplekt.ru/userfiles/file/repuw.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/146fb27ed95cbbe96c29e0c6ac491a34/galaritodefajenovu.pdfIn PDF document text
    • http://8njl.com/userfiles/files/73996909491.pdfIn PDF document text
    • https://holcom-wd.holcom.vn/webroot/img/files/42870977634.pdfIn PDF document text
    • http://alliance-ic.ru/uploads/file/46975913873.pdfIn PDF document text
    • http://tjsyjdq.com/v15/Upload/file/2021912174218081.pdfIn PDF document text
    • https://rougezenekar.hu/files/file/wimof.pdfIn PDF document text
    • https://best-label.com/upload/files/poxikupuloxez.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fca98ed048---zojegefujiwexorupiropas.pdfIn PDF document text
    • http://katour.ru/admin/ckfinder/userfiles/files/34032673525.pdfIn PDF document text
    • http://dui-antidote.com/images/userfiles/file/sigajesofekibetiw.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dadcb5926c---35277620254.pdfIn PDF document text
    • https://webmedcentralplus.com/userfiles/file/koloj.pdfIn PDF document text
    • http://rszm88.com/upfolder/e/files/20210908192235.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/q09tnhqd2ahcp9avibpcq8aen1/fedozabotila.pdfIn PDF document text
    • http://abcbyspu.com/ckfinder/images_store/files/65609985033.pdfIn PDF document text
    • http://xn----7sbakif2a3azdub.xn--p1ai/admin/ckfinder/userfiles/files/sadiluxafaragesuwoz.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/dfe110e96e6096f902068a6944636f84/dovovujeduzujokokunumekid.pdfIn PDF document text
    • http://www.bargiel.com.pl/ckfinder/userfiles/files/karevuwunusexano.pdfIn PDF document text
    • http://xn--2o2b17g32e8xisqq.com/userData/board/file/88771081417.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/7ae8c967d7bd335a5d29686d1ad66a42/93530256119.pdfIn PDF document text
    • https://middletonchambers.com/ckfinder/userfiles/files/kexikur.pdfIn PDF document text
    • http://mgocsm.in/userfiles/file/sireva.pdfIn PDF document text
    • http://directartdeal.com/uploaded_files/userfiles/files/tezixal.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_off0000e585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE585 10256 bytes
SHA-256: 31cb3c1a91759bc61a18e709e7a650f2de606c118a104f13d9fdd5f04e293f52
font_01_sfnt_off0000fcd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD9 18188 bytes
SHA-256: 909dedf4bc1dc33c02e7307ed28ba28949a56492f089c1ae1001edc3bdc66244
font_02_sfnt_off00012ba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BA9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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