Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ee62fdab303d1c6…

MALICIOUS

PDF

69.8 KB Created: 2021-02-04 03:08:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: bb7b807de294afe4e2565858e13583cb SHA-1: c783fad40144061a7446cb87df7ddb4d26f7cd9b SHA-256: 1ee62fdab303d1c6433f5726b904ee13a290eacf8ed97de2f55b34da9a3dac4e
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/123?utm_term=thailand+translate+to+spanish'. This URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a phishing or trojan distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/123?utm_term=thailand+translate+to+spanish In PDF document text
    • https://cdn.sqhk.co/xakelafu/0NQeaqv/85812502491.pdfIn PDF document text
    • https://cdn.sqhk.co/manuguwe/idgdW1Y/wwe_funny_videos_top_10.pdfIn PDF document text
    • https://cdn.sqhk.co/gobisofokox/jggA4hi/tevudulas.pdfIn PDF document text
    • http://kavuxolabazili.iblogger.org/6627843202.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484834/normal_5fefe525a3dbe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495985/normal_5fe284fcd8873.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/nevovumowa/jupudase.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/application_areas_of_computer.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/fefusejir.pdfIn PDF document text
    • http://juwebud.epizy.com/free_editable_fishbone_diagram_template_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/10148395640.pdfIn PDF document text
    • http://gojexigubobe.epizy.com/25086726969.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/bioenergetics_pre-_activity_worksheet_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/pomizukegeke.pdfIn PDF document text
    • http://jipinasin.epizy.com/nekulejiw.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_off0000d305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD305 4996 bytes
SHA-256: b3ad7d1e033208e6dafedadfc84ac79d0fb8b0f2dbd5a1336b1edf623fc26ab3
font_01_sfnt_off0000e3f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F4 10788 bytes
SHA-256: cc3150145647a3cb415c2f8bbe4ab161d07109dd218df6e89eeb03bf4a0535ff

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