Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc4e922eb7b70048…

MALICIOUS

PDF

83.2 KB Created: 2021-06-28 22:48:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 62436f712b0b953cb2602db71d710933 SHA-1: c3195f5c78dcd44ef08dace03074e3c1241c5d79 SHA-256: fc4e922eb7b7004817dabe96f4c55a43d6d1e4111fc9159c991de1dc95a0adca
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The embedded JavaScript is a common technique for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/9adc9cd3f352945dfb4afbd415db9763/fafulisasara.pdf In PDF document text
    • http://burningspearmarketplace.com/js/ckfinder/userfiles/files/16593430226.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b085bb22418---32605507965.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f2c5723336---33947946850.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/b28c15c1ca2d491a03428da0d4e5c2df/59380158281.pdfIn PDF document text
    • https://copperscraphandlers.com/ckfinder/userfiles/files/41498767370.pdfIn PDF document text
    • https://samsungklimamodelleri.com/upload/ckfinder/files/69661985595.pdfIn PDF document text
    • https://ilmercatinosottocasa.com/file/fusib.pdfIn PDF document text
    • http://thegroverestaurantnj.com/userfiles/files/84079653484.pdfIn PDF document text
    • https://biocoils.com/img/file/bijat.pdfIn PDF document text
    • https://summit-christian-academy.net/scauserfiles/files/48128498384.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c75bb1c706---88199706764.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088f44cdc268---vomamawuxotag.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d41d17a683a---xidun.pdfIn PDF document text
    • https://majubesar.info/contents//files/85538508064.pdfIn PDF document text
    • http://coyada.com/up_images/up_images/45124393116.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c872ccd75f5---27661770053.pdfIn PDF document text
    • https://soudurelauziere.com/upload/editor/file/87887540467.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/447e6607280f48e9a00919d90ce99460/73747391167.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/f82e0f295745a7063c9171d0f1ede47f/lawusuxotew.pdfIn PDF document text
    • http://myxroad.com/upload/userfiles/file///filos.pdfIn PDF document text
    • https://mvpartners.be/images/uploadedimages/file/dozikuronamiz.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8ce5a1f8d---15528478698.pdfIn PDF document text
    • https://cleaner.pl/userfiles/file/tibajalinobojobi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=jee+mains+jan+2020+question+paperPDF link annotation
    • 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_off0000e289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE289 10976 bytes
SHA-256: 3c8ed83537b9f6e3777794e6d46b262631c4c5c4067d3d6f51f0d73f4870d04f
font_01_sfnt_off0000fbff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBFF 16900 bytes
SHA-256: b4460ba279ea113bf9c1dfd21aa6d4aae691ecd871368e4e22c49d7a39588797
font_02_sfnt_off0001276a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1276A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1