Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5c0a6099fde7ae2…

MALICIOUS

PDF

67.1 KB Created: 2020-11-24 04:13:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 24960d7595c3897a7405839d4822114f SHA-1: df1c5079ff07d52fc7f952e2af4678aea4adbc84 SHA-256: d5c0a6099fde7ae23a04e3278ae36223ff08af3383fd7a91f0a9d17d76f2c413
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 0.9998

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://traffnew.ru/aws?utm_term=philippine+electrical+wiring+standards+pdf PDF link annotation
    • https://najuxobetejip.weebly.com/uploads/1/3/4/2/134265875/xiwetakezobuw_deretokopeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375352/normal_5fa2a9c89e8fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390051/normal_5f8ea627d8c97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366341/normal_5f8a0d8f06af6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388424/normal_5f9db8bc35b7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383304/normal_5f90e533a53bb.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/f49fda3c-411f-4b80-acd3-15f555abf6fe/sadijuviramakonup.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/87589089361.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/tulexa.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/79766721415.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1039d22d-037b-479e-b0c5-a7429940d40f/chris_craft_constellation.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/read_fruits_basket_manga_online_free.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_off0000c913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC913 5508 bytes
SHA-256: 91aa62f2eb3a42120d08dcbc116ec5ccdf72ae0d930fc2a1bfb3e4577385c798
font_01_sfnt_off0000dbde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBDE 10432 bytes
SHA-256: ab5b1e0a1607ddfeca061801e3dfe7f359e3205615aef76c7053e7690bfb3289

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