Malicious PDF — malware analysis report

Static analysis result for SHA-256 5468e215f3fdfe71…

MALICIOUS

PDF

100.0 KB Created: 2021-03-18 04:44:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5e8b6d8b32c64acd95e01b48acc6a101 SHA-1: 12e04b8a0d15b5d8fa737cc9579a16567eb8e153 SHA-256: 5468e215f3fdfe7114170fd7bda5cc821a64cb913eda20990424881d9d522feb
194 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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 https://vilenefex.ru/award?keyword=anganwadi+vacancy+form+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4372955/normal_5ff5ba10da4f5.pdfIn PDF document text
    • https://nezuvaju.weebly.com/uploads/1/3/0/9/130969963/gemax_wobex_xazafojas_zuwos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410002/normal_60205b057960c.pdfIn PDF document text
    • https://jewakazakiven.weebly.com/uploads/1/3/1/4/131437085/misawom.pdfIn PDF document text
    • https://vosifiteke.weebly.com/uploads/1/3/6/0/136049758/ede23.pdfIn PDF document text
    • https://ludunijup.weebly.com/uploads/1/3/0/9/130968942/zamubi_xetavuw_pevozamov.pdfIn PDF document text
    • https://sezitekiporav.weebly.com/uploads/1/3/4/6/134627959/8752072.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427282/normal_601566466e17f.pdfIn PDF document text
    • https://birirewenojitu.weebly.com/uploads/1/3/0/8/130813362/35fa57b21c420ce.pdfIn PDF document text
    • https://nogigeto.weebly.com/uploads/1/3/4/6/134665346/fesexivoj.pdfIn PDF document text
    • http://kenuzerelo.22web.org/cambridge_touchstone_placement_test.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://kewumexor.epizy.com/energy_pyramid_worksheet.pdfIn PDF document text
    • https://f11c4bf2-12a6-49f8-9590-07a94b689168.filesusr.com/ugd/11276f_dcb208bd0d7e4f5bb59286b546bb2ecf.pdf?index=trueIn PDF document text
    • http://bulekixor.epizy.com/bamimimomuvokomegebu.pdfIn PDF document text
    • https://c4a5d104-04f9-44e6-b03f-1f5edac3680f.filesusr.com/ugd/f23921_375e87fe00294aafb6757baad259f053.pdf?index=trueIn PDF document text
    • https://e6f9d1db-9bad-45ba-a188-0e8e378e8087.filesusr.com/ugd/99b222_7292538a064e4735a6bc1032915aacf2.pdf?index=trueIn PDF document text
    • https://2080fafa-2491-4ac3-8118-a138f33bff34.filesusr.com/ugd/822ecd_e9fbc2982ed441e7afcf28dc54f6dadc.pdf?index=trueIn PDF document text
    • https://dc6b22d1-fd3c-476a-b8f1-b0505981f591.filesusr.com/ugd/ab5adf_271cc319bda04942ab0c6183c488218f.pdf?index=trueIn PDF document text
    • http://pikigefunix.epizy.com/ctv_kitchener_news_reporters.pdfIn PDF document text
    • https://ea74ff18-003d-4094-8454-8d7e15e33abb.filesusr.com/ugd/50de67_3ce122a4a0f34386a0bf3c4af5adfae2.pdf?index=trueIn PDF document text
    • https://aed022ca-8a9d-452d-9022-56a74a585a14.filesusr.com/ugd/4d548e_355c436e0728486785ec416c884d2e4f.pdf?index=trueIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010da2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA2 5508 bytes
SHA-256: 6da9b0ca1f3b63c2e5d12ffc97745ea39d2446a5b59f0cab2f2e7519ff81a1f9
font_01_sfnt_off00012071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12071 5484 bytes
SHA-256: 56f49a51a307248f12623a1f7399c3a9cb0685586f7171803fd84cca7b35fce2
font_02_sfnt_off000133f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133F5 11420 bytes
SHA-256: fb852938ed91d76fb5bc07681ac15c2867d980f7d939ed64e84d5d6dd3f339a7
font_03_sfnt_off00015b11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B11 12864 bytes
SHA-256: 27d6c22eb8f735d1e540a7c19770c0c2469d088242d7ec857242375eeeeaff51