Malicious PDF — malware analysis report

Static analysis result for SHA-256 44ccd5ea9a50aa1e…

MALICIOUS

PDF

119.4 KB Created: 2021-06-29 03:44:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 74ef4312548ee5d9f22772f5d5400346 SHA-1: ff66bb9c6c18c3cd7a891ea680b88823a58c285c SHA-256: 44ccd5ea9a50aa1e7f25464163d900f053dd915b3b56861754231808f1b17bbf
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing users to multiple compromised websites, each hosting another PDF. This behavior is indicative of a phishing or malware distribution scheme. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to exploit vulnerabilities or deliver further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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://markeishahall.com/wp-content/plugins/super-forms/uploads/php/files/7596f6dc7c7cfbae97d963d265bd5f14/59632687533.pdf
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae435638f2e---wobozoxan.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d412f591d6---fisejixusupewosav.pdf
    • http://cpbnatation.fr/fckeditor/userfiles/file/86065052988.pdf
    • https://techson-cctv.com/upload/file/tazakizakewukusutuxe.pdf
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/047f58d0eaca95946ee4b921e67322d3/37342942792.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086ddc1e1a82---kapadijalodulafanifo.pdf
    • http://akinmedical.com/uploads/file/13585723883.pdf
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/09d6fgseen18pn6i1v3644oeh4/rinozedexafizuwumuberuduv.pdf
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160944b10ebfa5---bivefomalawador.pdf
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec7dd707be---vemeravudivezivopanafo.pdf
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aa22196dfcd---70085136644.pdf
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/a63acf8bfa8d12a90b81822501987c95/mopejurulolabolojusili.pdf
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b02a6106aa0---71759798786.pdf
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1609e981909d2a---xinejitapov.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c174fcc1893---87772319188.pdf
    • http://metabolit-plus.ru/files/file/mabapovorazibinezen.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16077f909e78de---vasavelerevok.pdf
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608198602d3ae---84744917809.pdf
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa7a3411d6---tusenebavaluko.pdf
    • http://saovietgroup.com/upload/FCK/file/43288193907.pdf
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16083dcc0afdce---28658767045.pdf
    • http://agnieszkapawlik.com/userfiles/file/32425562445.pdf
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/rr2vkjq2pl6i3atojsoiq4n833/36210815974.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=fire+force+s2+ep+20
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7cf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CF 16792 bytes
font_01_sfnt_off00010fdd.bin
511799047274bb7e3d9bc7a6d871cbd8a347312101ee54bdc61fbf232a6dd6ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FDD 35892 bytes
font_02_sfnt_off000174ed.bin
f94eb405c075ea5de609c8fa8a020ba4350f8364d16f1a2a6953d769f079861f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x174ED 10280 bytes
font_03_sfnt_off00018c2d.bin
7e1e16521daa829d857304f9d67a2b2c821b01eb0f7316d2d183ffbbf7c20003		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18C2D 17780 bytes
font_04_sfnt_off0001ba24.bin
fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BA24 16164 bytes

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