Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0586d5d707cff4f…

MALICIOUS

PDF

89.8 KB Created: 2021-03-10 19:42:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: c3aa5816bb6c6a46ec219626692b2c92 SHA-1: 235eeb3e5b7e3164762243415f82c595a681239e SHA-256: f0586d5d707cff4f26d1796c87a83b19d1f352508af9558bee5ce3b0233eaba9
126 Risk Score

Malware Insights

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

The file is a PDF document detected as malicious by ClamAV and ML classifiers. It contains an embedded URL pointing to a suspicious domain, which is likely used to host a phishing page or distribute further malware. The document body, though heavily obfuscated, appears to contain keywords related to legal citation, suggesting a lure to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://xezojetit.ru/award?keyword=the+bluebook+a+uniform+system+of+citation+20th+edition+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4477400/normal_6019157fa2591.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385636/normal_600a129261086.pdfIn PDF document text
    • http://fipupibiveni.iblogger.org/event_ppt_templates_free.pdfIn PDF document text
    • https://nobakavukip.weebly.com/uploads/1/3/4/3/134373074/1599758.pdfIn PDF document text
    • http://fulusixavopowem.iblogger.org/ftii_pune_admission_form_2018.pdfIn PDF document text
    • http://zumubexupon.22web.org/hollywood_movies_2017_free_mp4.pdfIn PDF document text
    • http://kivudutamazawan.22web.org/final_fantasy_xv_gladiolus_dlc_trophy_guide.pdfIn PDF document text
    • https://melukibe.weebly.com/uploads/1/3/0/8/130873851/17f25.pdfIn PDF document text
    • https://sosanibizug.weebly.com/uploads/1/3/2/6/132695556/6658130e1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499282/normal_6010703d6fda2.pdfIn PDF document text
    • https://jamakebowixon.weebly.com/uploads/1/3/4/4/134477175/godasabolo_venuwej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369793/normal_601eb9d2ba1e9.pdfIn PDF document text
    • https://rudofodirofebas.weebly.com/uploads/1/3/0/7/130739781/95b7f5221f966f3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368978/normal_6004b111d83b8.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
    • https://uploads.strikinglycdn.com/files/9691eab1-d684-4f9a-95ea-8c0289744944/tibilidapuxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2678a650-f296-4cd5-9e16-6a08d56f7e00/top_business_analytics_courses_in_usa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de7cb674-4976-4035-9ac9-b8ef112736be/59596778273.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f8d394b-8f3c-4f32-9c82-248bfacc031b/spinozas_ethics_summary.pdfIn PDF document text
    • http://sexuvariv.epizy.com/what_is_a_topic_sentence_for_3rd_graders.pdfIn PDF document text
    • http://ragekelovu.rf.gd/what_are_the_10_positive_emotions.pdfIn PDF document text
    • http://mujelolix.epizy.com/94964041805.pdfIn PDF document text
    • http://kukokiw.rf.gd/88815292582.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_off000112b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112B8 5808 bytes
SHA-256: 2787c239486468415743ffa62b4c0c0545bc6fb0d6baf202856ca4a25b01f3aa
font_01_sfnt_off00012650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12650 10640 bytes
SHA-256: 394e9dad8cf7d0425904db4c5ba6b727a22cda70364ecf9c99b09bf7c451265d
font_02_sfnt_off00014a88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A88 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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