Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3c967e588a9dcb3…

MALICIOUS

PDF

86.0 KB Created: 2021-06-27 05:13:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e7c73776c4087d4e6a23f0d89690b902 SHA-1: 073cad864c0d0a9f921f7dd8dd888a742927c40f SHA-256: d3c967e588a9dcb3194eb3d630e6788e41aa99bb92445a8de389a9bad7060b18
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to numerous URLs, many hosted on compromised WordPress sites, suggesting an attempt to direct users to malicious content. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://garglob.ru/uplcv?utm_term=how+old+can+you+be+to+get+a+tattoo
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160849937854e4---55957512663.pdf
    • http://sevimticaret.net/userfiles/file/48206654743.pdf
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1609a57a16adaf---496406582.pdf
    • https://sinhadventure.com/uploads/file/fuvinisuzugelajotip.pdf
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a602a1bca1f---zuzemal.pdf
    • http://aitrans.cn/UploadFile/file/F1202106070744294294.pdf
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/nf39532oi3aaqoiecarl2hp24s/56505453274.pdf
    • http://fitnessklub-impuls.pl/uploads/assets/file/68887834131.pdf
    • http://xn--om2b25zm6igqb.com/ckupload/files/85807494023.pdf
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608de8be5c880---tedupunodeligoroko.pdf
    • https://hzautomatisering.nl/userfiles/file/35160043761.pdf
    • http://zlato-invest.cz/upload/files/55122472000.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac5a020cf43---xuxogu.pdf
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070dda7789c0---gisikamifijupebodu.pdf
    • https://stallion-international.com/userfiles/file/58640214104.pdf
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/vhrk9a15ci2cd7h9mojsk0shp5/vamaxijurofasipofus.pdf
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a53aada1529---lepotopofutaritube.pdf
    • https://ikima.fr/uploads/file/53628422278.pdf
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abcb042b6a5---35871725119.pdf
    • http://wib24-admin.de/uploads/file/dudofepefi.pdf
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160870e638f81c---92152976284.pdf
    • http://holzbau-napetschnig.at/37055092656.pdf
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ac7cb8e0c79---7751891672.pdf
    • http://yuhongzg.com/d/files/54493151445.pdf
    • http://bioterapiazabiegi.pl/obrazy/file/857582116.pdf
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/d02aad3f1519156d742845a7f3977492/jizoxuniwozelazozifuwem.pdf
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed13.bin
87e402eacb1c449be08e6d67c5027b4ca6dfea5625e5d7cf7c81a810f2140e5b
pdf-font-stream PDF embedded font (sfnt) at offset 0xED13 17640 bytes
font_01_sfnt_off00011a61.bin
9c604a8d6da064703a4cafe2ecbfff50dd1942125847fa9b12f50277f98e7ad2
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A61 10616 bytes
font_02_sfnt_off0001329d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1329D 16792 bytes