Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d06472ca4169257…

MALICIOUS

PDF

76.8 KB Created: 2021-03-17 18:55:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2cf18fc0f82e69c7e8d30d615c0efba8 SHA-1: eeab60d6f62ffe6d855d4ace71570e8ee49f3bf6 SHA-256: 1d06472ca4169257d0a0d2be953eb20f281025a80a7cb0bca091926f90795ccb
194 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links point towards a phishing or malware distribution attack pattern, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xezojetit.ru/award?keyword=calgary+community+map+pdf
    • https://xebazasasixuj.weebly.com/uploads/1/3/4/6/134641459/8021749.pdf
    • https://static.s123-cdn-static.com/uploads/4392877/normal_6008b5bc17702.pdf
    • https://befukifesili.weebly.com/uploads/1/3/1/4/131453358/faput_wetofosode_xosabifuzir_dawakumozodexa.pdf
    • https://dumetokewip.weebly.com/uploads/1/3/4/3/134394823/maxajekelajiro_vivipu_tezimomixugor.pdf
    • https://jelonuzekuxenu.weebly.com/uploads/1/3/2/8/132814084/motofizigilewuvuwo.pdf
    • https://rojogude.weebly.com/uploads/1/3/4/3/134396813/2131342.pdf
    • https://dunifavopugi.weebly.com/uploads/1/3/5/3/135312205/5046608.pdf
    • http://kogowetek.getenjoyment.net/37715642437.pdf
    • http://rowexusaje.mypressonline.com/zuxexuliderofefonilo.pdf
    • https://static.s123-cdn-static.com/uploads/4490515/normal_5ffa392d2f6e8.pdf
    • https://static.s123-cdn-static.com/uploads/4378606/normal_6003bb15c9209.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vazisi/bjt_mcq.pdf
    • https://uploads.strikinglycdn.com/files/03564d6f-dc2c-438c-86b5-256cb63bc722/7454178457.pdf
    • https://s3.amazonaws.com/vekodupiwarobi/28074914010.pdf
    • http://gutekuretejapoj.onlinewebshop.net/vesoguvakivu.pdf
    • https://uploads.strikinglycdn.com/files/2d8135af-de22-4713-b614-f91f9e3062ce/garmin_62st_review.pdf
    • https://uploads.strikinglycdn.com/files/33e2c797-0d3d-4f27-9a25-50a660fb8864/20858219060.pdf
    • https://uploads.strikinglycdn.com/files/301fcc75-7b41-4898-9c2c-57527e117fd9/logitech_mk710_keyboard_protector.pdf
    • https://s3.amazonaws.com/mujevubutukoxu/mental_capacity_assessment_form_uk.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecf3.bin
b586bffb25a1657a51b0180c503a72593e319d65036433cd8e88b2ff716559ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECF3 5304 bytes
font_01_sfnt_off0000fef2.bin
3d0a5c0e1ed42cc699fa354d828042a1472035ee1f548a25257a8e0d475dcd13		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF2 11180 bytes

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