Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd21704a2534f140…

MALICIOUS

PDF

77.2 KB Created: 2021-04-04 14:44:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 715684f93a9d3260a6a124c0a99205de SHA-1: 57563266a04a8819898887741469f8edc7b102e0 SHA-256: cd21704a2534f1401f87dca337966c9cbb0845c1dc30009959d667d9e6d4f36f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan. The presence of numerous external URLs, many hosted on disposable domains, strongly suggests a phishing or link-farming attempt. While no scripts were explicitly extracted, the PDF structure and URL distribution indicate a likely intent to redirect users to malicious content, possibly leveraging embedded JavaScript for obfuscation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dugedepap.ru/wix?keyword=omega+phi+alpha+cardinal+principles PDF link annotation
    • https://cdn.sqhk.co/dipewoduge/c7siVY5/51261931055.pdfIn PDF document text
    • http://modezewop.mygamesonline.org/nirufilak.pdfIn PDF document text
    • https://cdn.sqhk.co/zezerixuwab/lChh55t/15745592677.pdfIn PDF document text
    • http://lomuwugevona.getenjoyment.net/dubai_metro_map_new.pdfIn PDF document text
    • https://cdn.sqhk.co/metexemoraga/hehgrjc/nick_jonas_height_in_feet.pdfIn PDF document text
    • http://difanitukovu.mywebcommunity.org/kalnirnay_calendar_august_2020_marathi.pdfIn PDF document text
    • http://ligumexijigab.getenjoyment.net/43572592889.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c8070bf9-ed42-4c5d-8eb8-ca35ee70f136.filesusr.com/ugd/d38238_1b5e4576a1d04760bc88adb3c31fed97.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e7396a8-4737-4577-96ca-9a835b4d073c/fokuzuzefubavakewewexe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b99c155c-9360-4b5e-a653-416030502818/pentair_ic40_cell_light_blinking.pdfIn PDF document text
    • http://binuwuzipu.myartsonline.com/witakurop.pdfIn PDF document text
    • http://gozidonozali.myartsonline.com/697836940.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a79df2d-554c-49d8-b91b-80a9848cae01/city_of_thieves_adventure_time_gif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87f649bc-b713-42a4-bcb0-6ebc37647354/no_excuses_brian_tracy_free_ebook_download.pdfIn PDF document text
    • https://51f47fa2-20f7-4ec4-bb91-8ae4aee689b4.filesusr.com/ugd/917232_e2ebd3268a784cfc8dba651614048d9a.pdf?index=trueIn PDF document text
    • https://0ef2f354-78a3-4528-990c-72f69c86fc6a.filesusr.com/ugd/6a0da6_66510974ac154b26acdf9e0477aee972.pdf?index=trueIn PDF document text
    • http://sofibimibojas.myartsonline.com/62194415568.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b9b7ab6-e7dd-4c9a-afbd-3e08a5a4c176/99593963200.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82f2a1e5-be47-4145-a177-155a476d1dbd/what_do_i_read_after_the_last_olympian.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF72 5516 bytes
SHA-256: 487b599a1690242b368260253d044a20511c461333c533e0e49a2171d630e0cc
font_01_sfnt_off000101fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101FC 10492 bytes
SHA-256: 3dbc4c53920a719254209f156f6eed9e0358c6654781b8f23b36b7a3255a18de

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