Malicious PDF — malware analysis report

Static analysis result for SHA-256 35e128afbd51afcc…

MALICIOUS

PDF

86.1 KB Created: 2021-03-20 05:49:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 92f4fbee2288ff28bb2f4e5fb11536b3 SHA-1: 9fa4e6713699a9430c5f4e1235c00ff88dced744 SHA-256: 35e128afbd51afcc99ac883d3a01e4523126ebb5f20ccb33f5f9a17b63ec9fd6
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest it's designed to redirect users to malicious content, likely for malware distribution or phishing.

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 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://midufefew.ru/strik?utm_term=raypak+troubleshooting+codes PDF link annotation
    • https://sipinawuzukefo.weebly.com/uploads/1/3/1/4/131410227/tewusebu-wewezofo-lojofukojotozos.pdfIn PDF document text
    • http://front-glass.space/barn_burning_faulkner_analysisj1vce.pdfIn PDF document text
    • https://majojolug.weebly.com/uploads/1/3/4/5/134595566/zaresives.pdfIn PDF document text
    • http://ductsunlimitedins.com/ben_10_ultimate_alien_coloring_pages_to_printzb8uc.pdfIn PDF document text
    • https://gemudafaleg.weebly.com/uploads/1/3/1/8/131856492/8a690f7ad6c6921.pdfIn PDF document text
    • http://esmoney.site/gafivf01qh.pdfIn PDF document text
    • https://wosobariwosamu.weebly.com/uploads/1/3/4/3/134372044/54e9cb9af5db.pdfIn PDF document text
    • http://hytri.com/2002_xterra_service_manualxl193.pdfIn PDF document text
    • http://olymp-trade.top/45373533732mohq5.pdfIn PDF document text
    • http://stat-index-co.com/70963510312vvv1r.pdfIn PDF document text
    • http://itdiscounts.pro/john_deere_lx176_hood_replacementrxr78.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/tufitijinexu/what_do_the_buttons_on_my_dehumidifier_mean.pdfIn PDF document text
    • https://s3.amazonaws.com/daxemo/sikijov.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/exercice_corrig_sur_l_atomistique.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9f1f508-d54c-4687-9785-71212fff1dd8/87187252736.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58824362-c928-45a0-9bda-e48ca3dd5cf4/grants_for_public_school_field_trips.pdfIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/face_beauty_tips_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/what_is_rule_110.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_off00010fca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FCA 5648 bytes
SHA-256: 7b246b4886a62a5df217733864958252feabf51b62dc70653ce6861ec823229c
font_01_sfnt_off0001230c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1230C 11532 bytes
SHA-256: 791b9cdc747063b939871fa92d8277cfe1333d6a3a72e8915a7a1c96a14ec09c

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