Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c2106b1c30ce201…

MALICIOUS

PDF

79.7 KB Created: 2021-05-27 17:11:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d387f5de71bc440f22562833458ba67d SHA-1: 93f3e843c2260abf3bb711c63f15f8fb99f2a174 SHA-256: 2c2106b1c30ce201db7ef1186eeed06c00ab417a1d73ab4b011a2824a3abb2fb
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The embedded content, though heavily obfuscated, appears to be related to software information, likely a lure to direct users to malicious or spam websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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.
  • 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://crophysi.ru/strik?utm_term=what+is+the+current+version+of+iphoto+for+mac PDF link annotation
    • https://redefanugolikiz.weebly.com/uploads/1/3/5/9/135975275/tufok_katavagejerov_gavajam_kopegenonif.pdfIn PDF document text
    • https://mikazeral.weebly.com/uploads/1/3/2/3/132303371/9891508.pdfIn PDF document text
    • https://nefalitarula.weebly.com/uploads/1/3/4/3/134308949/sazitoveb.pdfIn PDF document text
    • https://mojilizide.weebly.com/uploads/1/3/1/8/131857690/b9f8dfc3babec24.pdfIn PDF document text
    • https://jijovozezara.weebly.com/uploads/1/3/1/1/131163872/zitumikebamerogiv.pdfIn PDF document text
    • https://jasugigikimodo.weebly.com/uploads/1/3/1/3/131383258/3064815.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450045/normal_5fdfb6ce1d578.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409826/normal_6048291d7d43e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403561/normal_5ffbc1fa47dc9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470207/normal_5fc6cf98e6139.pdfIn PDF document text
    • https://fulojexerewo.weebly.com/uploads/1/3/5/3/135345176/zekevonanoposebufek.pdfIn PDF document text
    • https://selijexobava.weebly.com/uploads/1/3/1/8/131856120/5206415.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/e9def785-3e28-444e-9324-cbdec36b044d/photo_movie_maker_free_download_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6be7e8ed-3ef0-4aeb-8c80-6db863966aea/husky_c601h_60_gallon_stationary_air_compressor_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1e5151c-beb8-48af-b311-db4efa2676c5/78965662161.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED03 5180 bytes
SHA-256: ef2e2851af487146acd497000d3c565c63b39607d21afb1442b32f1da884e72a
font_01_sfnt_off0000fe7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7E 10796 bytes
SHA-256: ee5eb9c435556de0440eae00c6405aad62ff0c93640ee03dbe87fc396f875605
font_02_sfnt_off00012375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12375 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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