Malicious PDF — malware analysis report

Static analysis result for SHA-256 d57c056d9cf9847c…

MALICIOUS

PDF

89.4 KB Created: 2021-05-30 00:45:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 5d519b3ea7330f4e27dd459609ca988e SHA-1: 273be463ce2dd8fa71fbaf13f32924f4fdb7a8bc SHA-256: d57c056d9cf9847c2f44785b2655b7cd1dca9270c64616320d7a6d38f43ccc17
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The embedded URLs and the document body's deceptive content point towards a phishing attempt to trick users into clicking through to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • 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.
  • 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://seumenha.ru/strik?utm_term=satyanarayana+pooja+pdf+telugu PDF link annotation
    • https://vatipasa.weebly.com/uploads/1/3/0/7/130775610/refidomitigurogen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529281/normal_600b2ab6e3873.pdfIn PDF document text
    • https://wojemedirok.weebly.com/uploads/1/3/4/7/134724763/fapuvezuvu_vubodija_wekebopasej_kokobu.pdfIn PDF document text
    • https://jexadafiveti.weebly.com/uploads/1/3/4/7/134765621/9f51200eec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366668/normal_602af30aee305.pdfIn PDF document text
    • https://garovinarabibaf.weebly.com/uploads/1/3/5/2/135293384/9dd5926b5e1d35b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444102/normal_60355fd48c87e.pdfIn PDF document text
    • https://ditutemisa.weebly.com/uploads/1/3/4/3/134381329/komiwitevira.pdfIn PDF document text
    • https://taxufizewafodo.weebly.com/uploads/1/3/4/4/134477277/4c8432a4.pdfIn PDF document text
    • https://xowozasa.weebly.com/uploads/1/3/3/9/133999953/8024866.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386607/normal_5fee152c6c18e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410027/normal_604b569bddcbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382187/normal_604e12feeb7ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425487/normal_606915887db11.pdfIn PDF document text
    • https://rasaputale.weebly.com/uploads/1/3/5/3/135323831/3720098.pdfIn PDF document text
    • https://duvefotod.weebly.com/uploads/1/3/1/3/131380754/zezojado-nivigazi-pegakemazuxifu.pdfIn PDF document text
    • https://zufogeseganoxe.weebly.com/uploads/1/3/0/7/130776657/zajavediwixan.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
    • https://uploads.strikinglycdn.com/files/a64561f7-7ef5-417b-9911-d16bcf06ce07/vosowoxuwaxovix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8aa3284a-2cab-4166-aada-cc32dd62f1f8/wesoxizu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/646b9589-d4c6-44bc-805f-1f62aa812182/fewajibazezigifirizi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c25b6a43-31cb-404f-acaa-23f580dee4f7/donedidisosarexabunip.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eefe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFE 5312 bytes
SHA-256: 30092f476e51db41deb6262324cacc17fc209bffba165a124da7b74d72533ecd
font_01_sfnt_off0001012c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1012C 7804 bytes
SHA-256: 82560f568335060021e32ebf33c4a65c74bb925b2adb55ce1980c6f97357aaab
font_02_sfnt_off0001196b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1196B 11640 bytes
SHA-256: e186830a80dbf71e68abcb3c444273e8638f37350962e7a82e541b131c31fba6
font_03_sfnt_off000140ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140CE 16228 bytes
SHA-256: 0cf5a0357d2ccc4706de4a02e7ed2cb7a162a68f2b706fdd97550d4b971f6884

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