Malicious PDF — malware analysis report

Static analysis result for SHA-256 32610e6b64890718…

MALICIOUS

PDF

106.8 KB Created: 2021-06-01 22:32:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 097aa6fa6ceb89b395d4292750aba226 SHA-1: b85a9130d52260223532b030c18fc6b2fcc21179 SHA-256: 32610e6b648907180514bb4cbb5065d1f05d5e98c152431439ea4eb99c9fd06c
164 Risk Score
Tags
free-cdn-ebook-manual-lure

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. It uses an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://nomylo.ru/pbw?utm_term=horizon+zero+dawn+complete+edition+gameplay+hours PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4491414/normal_5ff7d9fec6e74.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421049/normal_5ffa2d6a6b1b7.pdfIn PDF document text
    • https://semumivotuwebaz.weebly.com/uploads/1/3/4/3/134379403/tibawoxupafuvudeto.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392195/normal_604315a0541c1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407571/normal_5ff28f3c42964.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471959/normal_60171b9ed02a3.pdfIn PDF document text
    • https://judozonax.weebly.com/uploads/1/3/1/4/131454501/ginazobe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379380/normal_602fae35ccb42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451375/normal_6051728a9c7ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408348/normal_6030243cc8281.pdfIn PDF document text
    • https://vidiwubiref.weebly.com/uploads/1/3/0/8/130874646/togamu_zosaxukoxomel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464532/normal_603606c4ad89e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421210/normal_5fe6717e9bcb5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425511/normal_6011b41641b4c.pdfIn PDF document text
    • https://zatetemaf.weebly.com/uploads/1/3/4/4/134494585/8457209.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425908/normal_600c3771ebe92.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474170/normal_5ff23e7348088.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476593/normal_5ffb97108cbac.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9299fbcc-bc90-4f96-9704-8c899d29e7d7/how_do_i_combine_files_in_foxit_reader.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3574831a-6966-4b1a-8c40-44dbf1057467/16441682698.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/813c72a2-8448-4b17-bcf9-a4e8322737ce/54567398357.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/786ab72d-2f47-4732-adef-f8125e09c437/spelling_word_list_template.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_off000163a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163A2 5692 bytes
SHA-256: f6e3c08dc0f3a0b58a49b5880b2ef251e9ff2c443d38a5253591860408dc8977
font_01_sfnt_off000176f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x176F1 11308 bytes
SHA-256: cdeff3f8ee8a36a02feea828866c6e0e970e66a5cecf657a49ccbf1cd4935d0f

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