Malicious PDF — malware analysis report

Static analysis result for SHA-256 020787ee40aac29c…

MALICIOUS

PDF

87.3 KB Created: 2021-09-01 05:43:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 1b426a02a018d76a425d7af454d2eb54 SHA-1: 5c248cb2c75352317505a970f740ef876d110d02 SHA-256: 020787ee40aac29cca4fbaacb4fc92a75887234472658a478f19e6f39464a1c8
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate the PDF acts as a link farm, directing users to a compromised WordPress site. The presence of multiple links to disposable hosting and the use of UTM parameters suggest an attempt to obscure the true destination or to improve search engine ranking for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c139e01d1fa---86402254646.pdf In PDF document text
    • http://gayaarchi.com/userfiles/file/20210718101111.pdfIn PDF document text
    • https://aynadakikemalizm.com/resimler/files/bifurokibufujiruxo.pdfIn PDF document text
    • http://abarappresentanze.it/userfiles/files/93624394538.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/88972181304.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/5bf2ba5e12321a35bdcfc1069b4b0bfd/97739117112.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/q0ar53l5k125vnv3gvl02kahr0/89979655005.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/3d5o2l6hitsgteh068e4shnsir/89703985752.pdfIn PDF document text
    • http://www.reenactmentmarket.eu/images/wyswig_images/file/ganuwozodovujumimofemixi.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/9f9e03669c8e645b358a834f5ac9daa4/tepesosidid.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/22489518771.pdfIn PDF document text
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/kikazugakodebawiwi.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/v8ltai4vq29ti5t3mtso8kci70/begikazilufapiwapumij.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/vajepasomukifibogagid.pdfIn PDF document text
    • https://avflash.nl/upload/files/medazunigiduwitisi.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d636b9f837---42225460960.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cd9c2bb7d7---vudugijupesasedoxiraporo.pdfIn PDF document text
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/c45ot5e8r64pst2a8skdi0o1j5/72843553550.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/161127fbe2885c---satemitepede.pdfIn PDF document text
    • https://h1t-url12shio-turbo.com/contents/files/tugonixajuzi.pdfIn PDF document text
    • http://alexhofford.com/temp/files/file/96288837714.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610f3be927ee0---22755569892.pdfIn PDF document text
    • https://ubitanduk.com/contents//files/pabuvemimesupowigujagu.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/pazijurimuxidosone.pdfIn PDF document text
    • http://akgikorea.com/file_upload/fck_upfile/file/fudesagefiwavarizitiji.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=fade+in+professional+screenwriting+software+crackPDF 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_off0000ed6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6A 10948 bytes
SHA-256: 1a8d1a6dd215d9f202fcaaa8f8edee9627eb873f64602cd51b715fbd23d78a64
font_01_sfnt_off000106bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106BD 18256 bytes
SHA-256: b5c3e774cf04c972fc0b022a64562970416972f193da7e7ecf42113883f2ea29
font_02_sfnt_off0001363e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1363E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1