Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeb1abff1ff3de58…

MALICIOUS

PDF

73.7 KB Created: 2021-02-16 05:40:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: b952879112e76fb1cff7746ed6485f09 SHA-1: cc36e4bfe75d91ab941c98742c3621087f7ae6c8 SHA-256: eeb1abff1ff3de584d0106ee3b73322211baf12d5eb6f2f287f7e09153e7c1d2
126 Risk Score

Malware Insights

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

The PDF file is identified as malicious by multiple heuristics, including a high-confidence ML classifier and ClamAV detection. It contains embedded URLs pointing to disposable hosting, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains keywords related to book downloads, aligning with a lure for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://maypoin.ru/wix?keyword=lewin%2527s+genes+xii+12th+edition+pdf+free+download PDF link annotation
    • http://gevixadita.22web.org/tuzofu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470020/normal_60225e9a18b2c.pdfIn PDF document text
    • https://vadurevagide.weebly.com/uploads/1/3/3/9/133999829/5045855.pdfIn PDF document text
    • http://tujodugugejime.22web.org/25470431282.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460723/normal_5ff64b09509a6.pdfIn PDF document text
    • http://vibuluvizawo.66ghz.com/lazexixefudovolegi.pdfIn PDF document text
    • http://getinugalukef.iblogger.org/joining_hands_meme_template.pdfIn PDF document text
    • https://cdn.sqhk.co/pixafosabow/hgiKYji/jolteon_type_weakness.pdfIn PDF document text
    • http://jumuzonogajal.iblogger.org/protein_synthesis_worksheet_thinking_questions_answers.pdfIn PDF document text
    • http://pimebujeben.66ghz.com/gakotedanol.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
    • http://meluxowuxepos.rf.gd/zukurakomutererujuvudola.pdfIn PDF document text
    • http://mujusitajal.rf.gd/nopinix.pdfIn PDF document text
    • http://lubesugoninop.epizy.com/using_business_card_template_in_pages.pdfIn PDF document text
    • http://zajozikudesurek.epizy.com/gasoda.pdfIn PDF document text
    • http://matemot.epizy.com/27774065902.pdfIn PDF document text
    • http://mapulikilep.epizy.com/41541849329.pdfIn PDF document text
    • http://fipuxogililego.epizy.com/57858254316.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_off0000d5af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5AF 5412 bytes
SHA-256: 90d64f2c6b6489143bfa2669fe6a78907f371d24bad5d283329c730155a1c5df
font_01_sfnt_off0000e836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE836 10156 bytes
SHA-256: eae2baf13c767ed1487a17bfad7cffbe0c4acc6c67c5c20b7faa54d4241af9aa
font_02_sfnt_off00010afa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AFA 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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