Malicious PDF — malware analysis report

Static analysis result for SHA-256 996809805970c440…

MALICIOUS

PDF

100.2 KB Created: 2021-03-25 04:46:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b6c9c05a5c4b4279578f904200ca635e SHA-1: 2eace7f07f6354f053d5af3c7079c921d21c6071 SHA-256: 996809805970c4404070cfd9fa8b0240129463d3f16cb4078278a6b8bbcfe745
156 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. 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 0.9997

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 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://jacksth.ru/strik?utm_term=travels+with+charley+summary+part+1 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4452372/normal_5fd2c7bcea627.pdfIn PDF document text
    • http://believes.space/49880743131lsb65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373264/normal_60562f554a643.pdfIn PDF document text
    • http://giftcard-sale.store/reloading_bench_design_plansvb39d.pdfIn PDF document text
    • http://tertov.xyz/43988671517afkc9.pdfIn PDF document text
    • https://nodejobirutita.weebly.com/uploads/1/3/4/7/134748641/juzekeno-gejefixozo.pdfIn PDF document text
    • https://mavuweginu.weebly.com/uploads/1/3/2/6/132681431/4289751.pdfIn PDF document text
    • http://stonersfranchise.com/25280881831x1i32.pdfIn PDF document text
    • https://rafowatixi.weebly.com/uploads/1/3/0/8/130874563/pejitegowonikos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449419/normal_6018f898a14c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486751/normal_60469514831eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369646/normal_5fd911002ffde.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/photo_background_eraser_app.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/gigabyte_aorus_elite_x570_wifi_manual.pdfIn PDF document text
    • https://e37fb4d6-fac4-4cb1-96d9-cce2dae532e5.filesusr.com/ugd/ed2751_66e113f97ba147e993fad5512926cf22.pdf?index=trueIn PDF document text
    • https://1cf095b7-1d29-4152-b82c-7733cf7ba0c7.filesusr.com/ugd/c1de29_4e80774bf1b24b99b461c2c19146e588.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/xoludilasoparopo.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/tiniganirurepikisaworibaw.pdfIn PDF document text
    • https://20d2f084-0b1b-4cf0-9f58-0b75a0228a77.filesusr.com/ugd/e2f197_d98a38731fa242a6bf1307cdf7f6a8f6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/behringer_xenyx_x2442usb_usb_audio_mixer.pdfIn PDF document text
    • https://2f8a6ab9-e864-4757-b083-6627a13f4c48.filesusr.com/ugd/405339_deb4d02c8c6e4f28949e8127a908fb2e.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014bdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BDB 5428 bytes
SHA-256: dbcccb26f13fa9eea891c78517aed2057d3efc1c9012e1b209fefa3c0c2efa39
font_01_sfnt_off00015e43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E43 10844 bytes
SHA-256: 4298790a17097112d53a2ff087eb2a64ceff8a8d5a584c7a8d3fcc6eac425080

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