Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec69a1cb913a4f86…

MALICIOUS

PDF

89.4 KB Created: 2021-03-01 18:11:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 23c319ec97692f95bfa756acd936c9da SHA-1: eae4abd24b0d3ba32ad675838d1b9adda2c95885 SHA-256: ec69a1cb913a4f862815e745711cca47739646ce28bb833d3474e952b76562b4
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body, though partially corrupted, contains keywords related to a product, suggesting a lure to disguise the malicious links.

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
  • 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 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.
  • 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/award?keyword=toro+22+recycler+lawn+mower+model+20332 In PDF document text
    • https://cdn.sqhk.co/barugogip/RCpSkgd/xufitavazifuzuvut.pdfIn PDF document text
    • http://nazukubilonoj.22web.org/one_punch_man_season_2_studio_change.pdfIn PDF document text
    • http://volazanuva.22web.org/78593542132.pdfIn PDF document text
    • https://cdn.sqhk.co/fodexuxefeba/geeibha/fovedefolililolof.pdfIn PDF document text
    • https://zuriloteva.weebly.com/uploads/1/3/4/6/134623588/50dcc30ab1d0ba9.pdfIn PDF document text
    • http://rawoxaxevog.mygamesonline.org/what_is_a_flavor_wave_turbo.pdfIn PDF document text
    • https://cdn.sqhk.co/maxabamed/jchjFjb/monujuvukikij.pdfIn PDF document text
    • https://muwirejevom.weebly.com/uploads/1/3/1/8/131857435/e9fae7789b2.pdfIn PDF document text
    • https://cdn.sqhk.co/beledufe/gTVg9ig/car_crash_last_night_florida.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xowobovu.myartsonline.com/rufamaxojofofopise.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/mozarivagadulimiz.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/zotivubunigamejas.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/18209155726.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/mini_cooper_service_center_sharjah.pdfIn PDF document text
    • http://nojupaven.rf.gd/fosisaxamepozelabipo.pdfIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/behringer_xenyx_x2222_manual_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/australia_day_party_invitations_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/sogovekevi/zeteketetani.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/internshala_certificate_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/45709186116.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_off00012080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12080 5488 bytes
SHA-256: 2ee2e22c49d9d4bf246e9444aa001dc7f891278abb772bbda9017ba14345113e
font_01_sfnt_off0001332f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1332F 11048 bytes
SHA-256: 8cb10bb78b3a4fff72a2a99b8a412780c6fddb08e9f5a35f53bfd2840b8a5845

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