Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc4d12d387e466c1…

MALICIOUS

PDF

82.3 KB Created: 2021-03-06 20:12:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2d1666687a7138f67f9f5286ffba81cf SHA-1: 77392adfde9c3effd8aae3bfce177b836d3cf97c SHA-256: dc4d12d387e466c104f50bfb67f0f8de640801aa5f1be66284beff3b33d7fcb1
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, indicative of a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically identified as Pdf.Phishing.Trojan. The embedded URLs are likely used to redirect users to malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://maypoin.ru/strik?utm_term=altec+lansing+mini+lifejacket+jolt+waterproof+bluetooth+wireless+speaker+review PDF link annotation
    • http://pejokepi.mywebcommunity.org/waterpik_cordless_ultra_plus_water_flosser_wp-450e_-_blue_white.pdfIn PDF document text
    • http://topukovatawosu.sportsontheweb.net/kusegumozedezotume.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383577/normal_5fcb4c811c14a.pdfIn PDF document text
    • https://jazolesapixol.weebly.com/uploads/1/3/1/4/131453041/kiweradogib-dubamigik.pdfIn PDF document text
    • https://litemavokof.weebly.com/uploads/1/3/1/8/131871991/9622934.pdfIn PDF document text
    • https://vujivizu.weebly.com/uploads/1/3/5/3/135305207/96d37fe8f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476767/normal_5ffe4c1536b18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393916/normal_6027e4a9e64cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469370/normal_5fef534162d19.pdfIn PDF document text
    • https://vamalogobiw.weebly.com/uploads/1/3/4/6/134696595/2513401.pdfIn PDF document text
    • https://rukufutuseju.weebly.com/uploads/1/3/4/7/134748195/35946047757b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389084/normal_5ff4d6221d3c6.pdfIn PDF document text
    • https://kuludiliwalu.weebly.com/uploads/1/3/4/4/134484861/cfc74ed46a45.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381738/normal_5fec059ded96f.pdfIn PDF document text
    • http://xofofumireke.mypressonline.com/xasazilamifasowufidugoj.pdfIn PDF document text
    • https://supokiroxuleniv.weebly.com/uploads/1/3/1/6/131606692/56f0c3ebb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374979/normal_5fce4fbe9c146.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450041/normal_60247f5d03a3e.pdfIn PDF document text
    • https://daputonekamipit.weebly.com/uploads/1/3/0/7/130775603/e046a00ec7850.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466175/normal_5fe9a374c3a1d.pdfIn PDF document text
    • https://buxijoxusezo.weebly.com/uploads/1/3/1/4/131483018/6634408.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458125/normal_6042f102d360c.pdfIn PDF document text
    • http://digovin.getenjoyment.net/rolokowaxumogusez.pdfIn PDF document text
    • https://rubexanow.weebly.com/uploads/1/3/5/3/135346757/2b754e6ce99.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414871/normal_60006999bc889.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CB 4468 bytes
SHA-256: 3ccfee218ec60a05dda4806533cd0698d05c4535afcecf7588bc7d2a5eb78056
font_01_sfnt_off0001025a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1025A 5848 bytes
SHA-256: a991f208bef1a1aa5be5ef5b75ee5f8aec51592301db1ae475a74aa3806984fe
font_02_sfnt_off0001163f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1163F 10580 bytes
SHA-256: 4d136b7643dbff5da65466a03e69b5d2eaa77aa3ac1530b4802b9bd3f0104d7c

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