Malicious PDF — malware analysis report

Static analysis result for SHA-256 6076e1a3f8b03ec7…

MALICIOUS

PDF

96.8 KB Created: 2021-06-29 02:12:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: f99436cdb74f9ef69e16df3c52923ea6 SHA-1: 535259e1eda05ce750276f2573ec310eb3b3a835 SHA-256: 6076e1a3f8b03ec73e78cba76982940c9e6d3d56f772fb6ca0e9c057cca09b54
164 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate a high probability of maliciousness. The document functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, likely intended to lure users into downloading malicious content or engaging in phishing. The presence of a visual download button further supports this deceptive intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e3ab9e218---wabimawipoju.pdf In PDF document text
    • http://gursakaryahukuk.com/images/file/zofenafufowiwabaponez.pdfIn PDF document text
    • https://cissud.it/uploads/ck_editor/files/3778746150.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/2018baa1249697bb34f0978251ffad68/81867346036.pdfIn PDF document text
    • http://abwessex.com/uploads/files/81148690423.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160749605e4b7b---bomulin.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/ccb18134b09a156421b1c869e1fb58e7/80260421766.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e32d6afe45---jadajisonokaxe.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/32680551193a1ed694b4ae59e8cffa46/zibituleferubebap.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16086b628a0da7---zerazimizokidadime.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/9a0cb65104f6bc7bf89ede3aedf10dcb/62956841907.pdfIn PDF document text
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160813e607ff77---pidanixokemubob.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606e44a689154---71514161638.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/pinavuworakexasalufoj.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16078474eee892---bogosagubafimesovaxusi.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/hj6osaq95m4vd9frelip0a5rld/42735838613.pdfIn PDF document text
    • https://petkasem2hospital.com/images/upload/userfiles/files/61902465720.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16076bc7436ff6---25648593399.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc830c9861b---vevenugedikekan.pdfIn PDF document text
    • http://slenderclub.cz/ckfinder/userfiles/files/gixolorupidivamidujixelat.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607eac713bec1---detizid.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7a6a3926f5---xupen.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609086e737d91---72762422048.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=coin+master+ios+hack+downloadPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF88 16320 bytes
SHA-256: 0dcfee8b6d2d2d0ff59a6477f4289c3cbe4594613395248f18dcd5f327d3c8e7
font_01_sfnt_off000115ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115CE 17772 bytes
SHA-256: 0db4f332c59e635fe460aa4e61b42fe835d2aabbd9aa13de0d1bf736413e3604
font_02_sfnt_off000144b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00015ccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CCC 10844 bytes
SHA-256: edf2911f4ebb3a4fda79122d65fc9d693ebfa877ff13d7097e97b4d547548e85