Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffe64b3348e2fc7d…

MALICIOUS

PDF

82.3 KB Created: 2021-03-12 11:50:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a7b12988cbefb19946d26d4b4336def5 SHA-1: b12b81c9892be7a5fa273db9f0964d31546dbf70 SHA-256: ffe64b3348e2fc7d1235b90c963bedabf1a580ac2e7bd3d4d7cd35d2a734a50c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://pelibifir.ru/wix?keyword=endocrine+system+worksheet+free PDF link annotation
    • http://unosital.space/ffa_creed_challenge_crossword_answersdseqn.pdfIn PDF document text
    • http://idealslim-italiaofficial.site/74730632063atays.pdfIn PDF document text
    • http://pozezan.mygamesonline.org/saravufetojidorugelip.pdfIn PDF document text
    • http://jivavesomuviz.getenjoyment.net/what_is_the_hindi_meaning_of_pentagram.pdfIn PDF document text
    • http://momentshop.website/rajasthan_3rd_grade_teacher_salary_after_probationfve2r.pdfIn PDF document text
    • http://lazirog.mywebcommunity.org/fuludulixitalut.pdfIn PDF document text
    • http://armada.technology/45989583470vustz.pdfIn PDF document text
    • http://naturalik.fun/chemdraw_free_windows_7qyhde.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xijejuvi.myartsonline.com/goodwill_meaning_in_accounting_terms_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/is_newsmax_tv_on_hulu.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/create_iam_role_using_cloudformation.pdfIn PDF document text
    • http://wenares.myartsonline.com/teaching_strategies_for_millennial_nursing_students.pdfIn PDF document text
    • https://efa91360-7c21-416c-9d60-3189e0beb381.filesusr.com/ugd/42ffc7_297e05e05e3141e7a4dac312811a0ea7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vajefam/womulawalafisokadeboj.pdfIn PDF document text
    • https://6478d21b-237c-41b5-add8-96d7b9819624.filesusr.com/ugd/c7ef1a_3785dc51e61146e3a3670241f058702f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/54e91b80-a129-414d-b1b1-3b2cc9d214e1/how_long_can_prius_go_between_oil_changes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5789fe8a-9b89-4d73-88a5-6d5fd2f9f7ca/kabonisaxigupakenu.pdfIn PDF document text
    • https://e8c82854-2a0b-4c0f-82de-bac600ce06e6.filesusr.com/ugd/d017d5_006a0053e211484eb9dc697eab3fe7b8.pdf?index=trueIn PDF document text
    • http://temodorofeg.atwebpages.com/75229229595.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_off0001068c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1068C 5236 bytes
SHA-256: 89088de5c5779744009402ac11673f5d76f79abd819297c2ba9e7c89232db6cd
font_01_sfnt_off00011850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11850 10452 bytes
SHA-256: b4e6ff80962b1b60892b77780b981e92f9a6cec3e9d868a40724862dc1826f07

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