Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe6060461f3f7fb9…

MALICIOUS

PDF

77.5 KB Created: 2021-09-09 14:49:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 679dbae75a8a7269ebddab54a4d734a8 SHA-1: 2e6c511aa1eabaa76aceed7440fdc8abffb17f9c SHA-256: fe6060461f3f7fb948cf1567ddce3b39f4b034c557fa28a0e6e5dab7666c3eb4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a link farm for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malicious download lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://infrive.ru/uplcv?utm_term=minecraft+pe+for+free+android PDF link annotation
    • http://konsultacjenaukowe.eu/Upload/file/nukolemuwigodigateloz.pdfIn PDF document text
    • https://varbackaforskola.se/ckfinder/userfiles/files/getisav.pdfIn PDF document text
    • http://laclonghotel.vn/upload/files/47618210252.pdfIn PDF document text
    • https://r4binsh4h9-att.com/contents/files/tawogemevolokedibixodata.pdfIn PDF document text
    • http://healthywithhart.com/res/file/nijatedakuzavusuzalexuru.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138645c712ab---98418139225.pdfIn PDF document text
    • http://volkshilfe-ktn.at/images/content/files/xosujomebugaxixisoro.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/ofq4tq8b6qcf24upvjs0bsla75/mibizitibufenuvedax.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16130e66720932---dariri.pdfIn PDF document text
    • http://retco.ge/ckfinder/userfiles/files/18641963869.pdfIn PDF document text
    • http://maginsaatmetal.com/resimlerfiles/fativofupusotimoza.pdfIn PDF document text
    • http://bbfederico2.net/userfiles/file/duxutibikugot.pdfIn PDF document text
    • http://fujavietnam.com/images/Download/saxanuwujorawikuvele.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137474db93ac---97828000507.pdfIn PDF document text
    • http://vzwsportenmuziek.com/content_docs/97449484784.pdfIn PDF document text
    • https://capitalsyndic.com/userfiles/file/fenubulalesupi.pdfIn PDF document text
    • http://inimtrento.it/userfiles/files/fetukofupufarobumeper.pdfIn PDF document text
    • http://maxbrio.kr/files/files/59383597702.pdfIn PDF document text
    • https://hotelangela.hu/userfiles/file/55307237281.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/6kivmj05sfltaf97onbq1cv7v2/mewupiloxefu.pdfIn PDF document text
    • http://skpizzasubs.com/uploads/files/24049688643.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_off0000c9f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9F5 17708 bytes
SHA-256: d9ea568052ce21d2c04b2e51d1e08e1d80914a24b5b156a684aa15bc2adfbf4f
font_01_sfnt_off0000f8a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A2 10392 bytes
SHA-256: acc481bf144dfd76aba31a2704972f1ac937d79a68eb8cacc64624f418046066
font_02_sfnt_off00011040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11040 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1