Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4a802f63e6ea866…

MALICIOUS

PDF

80.8 KB Created: 2021-02-28 03:58:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 8f2b477dfb63e8325ad2dbc020968e8a SHA-1: c4e5b4139fd895b9ceb5b7fe8d6980a35aa1440b SHA-256: c4a802f63e6ea8666c8c2b196b4225843e77a08d0d8fe85f1473dfb16d97f4f4
126 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm and has been flagged by ML classifiers and ClamAV as malicious phishing content. The embedded URL 'https://druttle.ru/wix?keyword=playstation+network+free+psn+code+generator+medialateral' suggests a lure for users interested in free PSN codes. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution attempt.

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 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://druttle.ru/wix?keyword=playstation+network+free+psn+code+generator+medialateral PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4483587/normal_602ef340ae991.pdfIn PDF document text
    • https://cdn.sqhk.co/bogovureg/jh8ijfS/dual_universe_gameplay_fr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393348/normal_6016f7fcd53d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367311/normal_6033b49b2d45f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417313/normal_60282f6536e95.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452377/normal_5fe5165945314.pdfIn PDF document text
    • https://cdn.sqhk.co/lagitesavap/aVfjfDo/puverurumudixegosixixune.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4506063/normal_5fd91165c5f65.pdfIn PDF document text
    • https://cdn.sqhk.co/woguwubege/jgDHhcS/lodirinagudejujigamawup.pdfIn PDF document text
    • http://sisaratu.iblogger.org/bulbul_pakhi_bengali_song.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nuzuxuzenexeku.rf.gd/final_fantasy_7_remake_strategy_guide_for_sale.pdfIn PDF document text
    • http://fapibudu.epizy.com/award_show_hd.pdfIn PDF document text
    • http://ragomoxos.rf.gd/antares_autotune_5_free_crack.pdfIn PDF document text
    • http://mutifesojare.epizy.com/camscanner_for_pc_windows.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/reported_speech_test_intermediate.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/banjara_punjabi_full_movie_filmywap.pdfIn PDF document text
    • http://jusarim.epizy.com/i_am_not_perfect_but_i_am_limited_edition_meaning_in_punjabi.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/tri_fold_brochure_template_design_ai.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_off0000fe11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE11 5732 bytes
SHA-256: a72b263530b775cb1e7f37ae02b1f20ed0e1785b23482101bec45d41bf0c335c
font_01_sfnt_off000111a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A6 10380 bytes
SHA-256: da492a768b4b8d1588d30a2c18cab13f385fd55cabf18e3f44919965384dc489

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