Malicious PDF — malware analysis report

Static analysis result for SHA-256 e13ad1387a6b8630…

MALICIOUS

PDF

70.3 KB Created: 2021-08-02 17:21:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4ab193d66324296e7f5d9f3a31d27c3c SHA-1: 8a6dbf1f044cba28657a0140f88663236bf3292d SHA-256: e13ad1387a6b86301d9667b8f999367ff1e259036f548a74d2c21949a6a4098a
154 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to compromised WordPress upload directories, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection further support its malicious nature, likely serving as a lure to a phishing site or a download host.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6691

Heuristics 5

  • 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
  • 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://sunnysolutions.it/uploads/assets/file/28027300113.pdf In PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d3f937e760---golininisaxafoka.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c668267a811---lovejutizut.pdfIn PDF document text
    • https://intrigantka.ru/images/userfiles/file/68158408677.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a388344d464---55250818180.pdfIn PDF document text
    • http://faulkfamilync.com/clients/c/cc/ccb94402b1eed20a0583117be0c0b506/File/18121321895.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa00618ed6---32615953276.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a25342855---zonoreguviwujewu.pdfIn PDF document text
    • http://misspacificus.com/clients/873634/File/66715398687.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/u0b9h53a10rd2phulgrmnpq43g/jufakagokiwawugowijipali.pdfIn PDF document text
    • http://abcbyspu.net/ckfinder/images_store/files/zugegaden.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f67984668c7---febinu.pdfIn PDF document text
    • http://npas.ru/pic/file/jabinubonarodatapotaf.pdfIn PDF document text
    • https://classconnbio.com/img-jacson/files/nusuxezojukefixuteser.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/36549329652.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/3f85f9c0515b92fca77795bc8fdadf55/76076523558.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b58f376fc24---badexafefatak.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/vizelarotesamapowugi.pdfIn PDF document text
    • https://biharlokmanch.org/userfiles/file/85220633638.pdfIn PDF document text
    • http://watthaistuttgart.de/userfiles/file/mavasubutimaxigonujuxebis.pdfIn PDF document text
    • http://aexpress.lv/index/images/up/file/77441627947.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1180974e8---xiwizexevix.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ae85a6b3789---womawaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=how+to+use+my+sage+smudge+stickPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA39 10844 bytes
SHA-256: 07015f721741a1d4f5477eb2d95cdaa12791254afcfbf94076211d8616de6750

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