Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2eeec270d05d996…

MALICIOUS

PDF

135.5 KB Created: 2021-03-26 08:17:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 07a22ba4eeb56de88166d895cb3da79f SHA-1: b01e55da0e981ecbf5d6085b4039f122dffff74c SHA-256: a2eeec270d05d99617d3dee3621680ebee3ce466bf09a93f35a7c893e61e4cc2
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable domains and redirector infrastructure, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF's 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 0.9997

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
  • 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.
  • 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.
  • 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://dafemum.ru/wix?keyword=warner+home+video+photo+clg+wiki In PDF document text
    • http://inostrana.com/49094530450rt4vv.pdfIn PDF document text
    • http://revershjtb.site/37320806109w3qbr.pdfIn PDF document text
    • http://netewe9.xyz/how_to_test_smd_mosfetbl3pd.pdfIn PDF document text
    • http://chambrely.xyz/dragon_dogma_quest_progression_guiderwais.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416299/normal_5ffd258154398.pdfIn PDF document text
    • http://astropsychology.site/divavubitefojilimamesaezqeo.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382639/normal_6013a63b08dc5.pdfIn PDF document text
    • http://pixxel.life/cesar_aira_alejandra_pizarnikygyqm.pdfIn PDF document text
    • http://am-sound.ru/tigulupivipujasenivaboliw9i8m.pdfIn PDF document text
    • https://wobanavemo.weebly.com/uploads/1/3/4/0/134096337/lozofokodifama_fosulodam_vinijolororel_roxozijiruza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376629/normal_5fe9908ec537b.pdfIn PDF document text
    • http://confirmationhelpcenter.com/exegetical_commentary_on_the_code_of_canon_lawin913.pdfIn PDF document text
    • https://zatitudebijozi.weebly.com/uploads/1/3/4/4/134460539/wutalope.pdfIn PDF document text
    • http://espaceclient-cmb.com/89529285686rjjfi.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/zukogi/madesanetagavilap.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/latuvinodanudukugodew.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/gamerisuzij.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001c0eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C0EB 5540 bytes
SHA-256: 934d94dc6c044b2ebd31e0828a4a75ad9a6074d5a963ad4e5d70303c9970b37f
font_01_sfnt_off0001d3b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D3B4 11424 bytes
SHA-256: 1a3e6f000c186c0ca0f16df863f2f3b750767e6844aaf4690512aa375371d57f
font_02_sfnt_off0001fad4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FAD4 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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