Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd2ede11cf28d136…

MALICIOUS

PDF

86.7 KB Created: 2021-03-23 09:47:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 4c8813e56a33d23ac70e28d68979654c SHA-1: 5a06b9e22dc9a1d437d097856f598ac585081438 SHA-256: cd2ede11cf28d1366099882554be4c624644ce3a234bc015554ea388adaea107
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and configured as a link farm, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://resalured.ru/strik?utm_term=do+not+pray+for+easy+life PDF link annotation
    • http://fewizoge.22web.org/sovolazudiweluse.pdfIn PDF document text
    • https://cdn.sqhk.co/daxerarugak/jieidhi/basabaropowokolazip.pdfIn PDF document text
    • https://cdn.sqhk.co/difigobon/4jdwIi8/zudeju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451750/normal_603086a515ed0.pdfIn PDF document text
    • https://cdn.sqhk.co/butixasa/jgiU8uC/blast_furnace_guide_gold_ore.pdfIn PDF document text
    • http://pusedoropeseb.66ghz.com/sizojigegijefuzoradifu.pdfIn PDF document text
    • http://meetsol.xyz/rakiwikxe758.pdfIn PDF document text
    • http://gabubixaj.22web.org/92371647535.pdfIn PDF document text
    • https://cdn.sqhk.co/lobitukojuro/R89tihE/jejapokepaserurametemoj.pdfIn PDF document text
    • http://rollernefritmassage.xyz/best_free_stargazing_app_iosdn31q.pdfIn PDF document text
    • http://milanbeachs.space/innova_3020d_code_readerdj6e9.pdfIn PDF document text
    • http://bivoliku.mywebcommunity.org/application_for_sick_leave_in_office.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376088/normal_5ff524afcfedc.pdfIn PDF document text
    • https://cdn.sqhk.co/wugolekufo/EyijUha/wewazuba.pdfIn PDF document text
    • http://iglivesupportteam.com/lovoraduzujuturikuvumisadmb60q.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464874/normal_5ff230bebdb7c.pdfIn PDF document text
    • http://nofomunagipu.iblogger.org/jedagubuxikisesinipo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://tuzotulerijenej.rf.gd/free_templates_for_construction_business_cards.pdfIn PDF document text
    • http://suwotewi.epizy.com/96197405977.pdfIn PDF document text
    • http://deketinak.rf.gd/palolesusekebog.pdfIn PDF document text
    • http://rijemow.onlinewebshop.net/tagafaxuvuromodofune.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001070e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1070E 4784 bytes
SHA-256: e702d4d80b5afdfdfbdc26e1749835d97a7e387280ce1779a6b889e9bedb61bc
font_01_sfnt_off00011763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11763 11824 bytes
SHA-256: a36c16f43a37f91762196d93d02f2a65ac52da1f428d5702381b97da8641dd4b
font_02_sfnt_off00013f8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F8F 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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