Malicious PDF — malware analysis report

Static analysis result for SHA-256 d53a886bddb932d0…

MALICIOUS

PDF

93.2 KB Created: 2021-07-13 12:51:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: ca269f933b28948d6b6d8968fab5f108 SHA-1: fefae20fdd7f0545d4a827dd35f40fb7286b7b60 SHA-256: d53a886bddb932d06e46359e173b5a27bdfab50132b1ad0437613447b8f90c77
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. It also features a link farm pointing to multiple PDF files hosted on compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9866

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/86j2r3b5pje9uklpvdf9tc045k/gokewovavuxuduz.pdf In PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/9d40e25c3783a57a8ebda60bdde16c66/87552115608.pdfIn PDF document text
    • http://www.creativitaecomunicazione.it/js/lib/ckfinder/userfiles/files/lunidajunotejam.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/4a518b524fc4c0d6e44c7124fc068239/boxufivirofenumebow.pdfIn PDF document text
    • http://pwr-tech.ru/userfiles/file/36434994043.pdfIn PDF document text
    • https://styliststudios.com/imagesTE/file/37232977829.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/masariwupepuwuz.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/ipomikavivigulimikis.pdfIn PDF document text
    • http://ugrctrani.it/userfiles/files/juwazijudotapemezuv.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/d8f9ddc49c6210bd3a652f4be3fa63fc/70562465389.pdfIn PDF document text
    • http://ecogestval.com/userfiles/file/tanoma.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e41ee5366---jinajaxebu.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/5e4dd943a2d91ae5781490773b1f5da6/16033567223.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/76a7vadprri2f2qcq9e2l1ea55/26277576203.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/demar.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/iv7fu2igm7nl26idt7pgibpac4/nunesezoduvabolobe.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/faruxez.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ivtlsnudkpln8ejqdf4ljro2e4/nafedumilog.pdfIn PDF document text
    • http://kayapaliinsaat.net/file/vagepevovuzuvajemavozewa.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/2f68ccbee8564094d7cffaabe61fea29/renosowajesonage.pdfIn PDF document text
    • https://cardion.dk/gfx/fckimages/file/40564462702.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160c46780201b3---66282149380.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/967b4ed2e2f6619414869b65ce33485a/18813103079.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=boys+over+flowers+season+2+all+episodesPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e898.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE898 16232 bytes
SHA-256: 01cd0e4798e93fb086042d610f43ddeed7bf091af48aa863f5c4a4f61b651684
font_01_sfnt_off0000fe71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE71 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11683 17528 bytes
SHA-256: e10dfe3233cfc64340feb43de1428e74482df4b92d85db9e4814426bd502a00d
font_03_sfnt_off000143f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143F3 10832 bytes
SHA-256: cd8b7571f71790d99604263ab37b755dbd25976b108df9b07636467b117f58c4
font_04_sfnt_off00015d2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D2D 2044 bytes
SHA-256: 3b43501740866460582ca7e38184bbc4560f796081315db606c0714aed2df1cc