Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1fa13977eb17974…

MALICIOUS

PDF

73.1 KB Created: 2021-01-25 15:08:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: fd6a643b4eb03b13e18a99103240d240 SHA-1: 47723f85214ebd3b536ce0b9cb76db7ce50f317d SHA-256: a1fa13977eb17974168c3c7c710a21f5a5ff5ab9a12e695f17fb17964ca107f2
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, indicative of a link farm or phishing attempt, with one URL specifically identified as an external URI. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards an attempt to redirect users to 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 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://jottigo.ru/123?utm_term=eyelash+extension+waiver+consent+form PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4368225/normal_5ff6256b66afe.pdfIn PDF document text
    • https://begakidiwadagav.weebly.com/uploads/1/3/1/3/131397934/zaguwexevepo_zizimur.pdfIn PDF document text
    • http://smcjd.com/love_kitchen_artfmrqr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425933/normal_6007f100e2fd5.pdfIn PDF document text
    • https://joxenunufob.weebly.com/uploads/1/3/1/6/131606789/ximaseta_vopukub_jefadezomite_fevoxovolomigi.pdfIn PDF document text
    • https://pixipemojawipe.weebly.com/uploads/1/3/4/4/134459682/1ae6d835ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385206/normal_5fe672b90c133.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393624/normal_5fe786941c850.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403816/normal_5ffebed7adbc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423148/normal_5fe79322156f6.pdfIn PDF document text
    • http://about-fb-support.com/crystal_islands_spyro_10_gemseohug.pdfIn PDF document text
    • http://canlisohbetim.net/12629207195eo0sj.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/vezumobigodub/35124392908.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/cracked_software_for_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/budget_excel_template_personal_finance.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/tovebutig.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/54851098349.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_off0000e104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE104 5400 bytes
SHA-256: 8946c0dbcd361682fbe29840a5177ad8478371622888a0e1c6012caff9cae719
font_01_sfnt_off0000f35f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35F 10372 bytes
SHA-256: 30ebe54f4555aed7b7ad647de3ebaf5d2e85644529a26cbe8294061d00128ee3

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