Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c22676acafc9266…

MALICIOUS

PDF

86.2 KB Created: 2021-08-28 20:29:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: a4bd14f1be57cd403128dffe094355ea SHA-1: e4ec2bbf33db76b4c82ce138c27442e99cc3c62f SHA-256: 6c22676acafc9266274725ac61ebadcb66ba9654eb088184cbbefd200ce983a0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by multiple heuristics as malicious, including a specific ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous external URIs and links pointing to compromised WordPress upload storage and other disposable hosting, suggesting it functions as a link farm. These links likely lead to phishing pages or further malware downloads.

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://irlanc.ru/uplcv?utm_term=introduction+to+network+and+internet PDF link annotation
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a80ec612501---59410238988.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3c506468e7---rezenunogezitagikisenir.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/29644582323.pdfIn PDF document text
    • http://tienhasteel.com/app/webroot/upload/files/xijepa.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160716f4783d5e---3738316325.pdfIn PDF document text
    • http://capitaldanceacademy.com/userfiles/files/44447041517.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/xiral.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c18f1c2dc9---43577817200.pdfIn PDF document text
    • http://sjhrz.com/images/upload/File/vuvupavigewovuxarawofa.pdfIn PDF document text
    • http://d4scanada.com/clients/8/81/81a8d3ecf29e0a7d9042e8364394d873/File/11620901832.pdfIn PDF document text
    • http://kfnmdg.com/upfolder/e/files/20210604141247.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cab73731dd---15415574011.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/fe2c95fb8dcde1bd691eff4a7a7c345b/danabufepabevibekizes.pdfIn PDF document text
    • https://aravlicraft.com/cmsCart//upload/file/36554986377.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ce5d53c4a2e---70399350330.pdfIn PDF document text
    • http://czdashan.cn/uploadfile/file/2021081213200773499.pdfIn PDF document text
    • http://beloit1962.com/clients/8/83/8368a4f838dea3176655029ae9e337da/File/witog.pdfIn PDF document text
    • https://readandenjoy.ae/userfiles/files/48870913443.pdfIn PDF document text
    • http://coeb.eu/userfiles/files/48010097224.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1607164dfa1f89---19151853910.pdfIn PDF document text
    • https://gulyaskantin.hu/uploads/frontend/files/saxukesuja.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/jenoots8139ti296vfrv48k1hs/muxatupaxobowu.pdfIn PDF document text
    • https://fetogram.com/images/upload/files/pekejijoredafapimogadow.pdfIn PDF document text
    • http://ip-golubev.ru/ckfinder/userfiles/files/rofavesamixigibojarijawub.pdfIn PDF document text
    • https://m-isc.com/userfiles/file/wapibepexozupolamopadamaw.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_off0000eb9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9C 17692 bytes
SHA-256: 1808c4408a0772992b81c6a5ce50f413a789080dedff477062e32fc6f1c2bc2c
font_01_sfnt_off00011957.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11957 10376 bytes
SHA-256: ce63c6cbb997a9a8dc91942e4083bd4d3b2e32953a5d61754dff6dc7ae9ad39b
font_02_sfnt_off00013100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13100 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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