Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e2efbdb42099a88…

MALICIOUS

PDF

88.3 KB Created: 2021-07-05 19:19:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 4142a1a9bec7626f2adf9a4e748d1020 SHA-1: 2c2b3c1957d4568dca8eceb9b074e5a2ec044c80 SHA-256: 0e2efbdb42099a88443ece267aa0afbe992d3c1d6a34717fa54b6c3fd851501c
156 Risk Score

Malware Insights

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

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 functions as a link farm, containing numerous URLs pointing to compromised WordPress uploads and disposable hosting, likely to redirect users to malicious content. No scripts were extracted, but the presence of external links and the overall structure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://www.alapan.org/fckimages/file/tixukawinexupoda.pdf In PDF document text
    • http://andlupa.com/userfiles/file/bokavebogewopes.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/g8lvfq3vi7e3tjq2l7v2als747/90200410701.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/42e7b73ef51fcff56108ca19c97fb494/bazubirudigasixa.pdfIn PDF document text
    • http://asianmosaicnyc.com/userfiles/file/zumamanubonato.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/cf805dee2b9a507b3439add084776a73/6349706281.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/378d9c2e608ae2e37e80e9cfcb07321b/sijijuwiji.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b53b4373b8---31771835345.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160af6b38de3c8---5504267217.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/cdc2b3f714967fb4d9e340835486d389/5192821544.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073ab00150c0.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16081f678a4c30---7069434845.pdfIn PDF document text
    • http://mobydick-band.de/fckdata/file/33539026127.pdfIn PDF document text
    • https://noddy.nu/images/file/3025125576.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/24780308346.pdfIn PDF document text
    • http://bethelcommunityone.com/clients/880032/File/gadofenajexobivuwol.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160bf8c60d9796---mivamonegi.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd7b9898d1f---ziperamividip.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/4k0ungla535bc39m13238bci0d/44035514931.pdfIn PDF document text
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/83641045069.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/22e86c49bf5c6e3b555d297e537d9661/kogabafavomadikogud.pdfIn PDF document text
    • http://mylodge-naoshima.com/bifufebinebaxutefite.pdfIn PDF document text
    • http://guanzhuli.com/userfiles/file/balupumimu.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/bdff13138a10c81c331488b5f652d190/27828044383.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=fun+things+to+do+in+minecraft+ps4PDF 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_off0000f407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF407 11176 bytes
SHA-256: 371107e2d43142dcdd3b4d6a79393b3c29501a897b2b8f62579670e7f0cf33f9
font_01_sfnt_off00010dc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC5 16948 bytes
SHA-256: 2d78772cc5ef1fbd865c1abbb96fe635ccfb7f8f57bfcce55163715756945c23
font_02_sfnt_off00013a03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A03 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1