Malicious PDF — malware analysis report

Static analysis result for SHA-256 966a559dc1499215…

MALICIOUS

PDF

78.7 KB Created: 2021-01-26 02:08:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 34e905c275f5da6004b9139a25523454 SHA-1: 537ded7718c41a8e83900e949ffa770ba01635da SHA-256: 966a559dc14992157a31f527a5fd7f18d18485cb2f64d5dc62d5104aecadf9fb
192 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains keywords related to device care and Samsung, suggesting a lure to download potentially malicious APKs. The embedded URLs point to disposable hosting and redirectors, indicating a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ggtraff.ru/wb?keyword=device%20care%20apk%20samsung In PDF document text
    • https://cdn.sqhk.co/fuzokikili/fl8ilha/zombieland_2_watch_online_dailymotion.pdfIn PDF document text
    • https://cdn.sqhk.co/majumoros/iazzgjC/53989274812.pdfIn PDF document text
    • http://podeves.xyz/bizogek87cg.pdfIn PDF document text
    • https://cdn.sqhk.co/daluzowinasu/rFGeiej/vikopilorusupube.pdfIn PDF document text
    • https://cdn.sqhk.co/disegivoji/IVcZgd1/petepufikopegaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378386/normal_5fe87b4c7add9.pdfIn PDF document text
    • http://hookup153.site/spices_hut_cary_nc21a54.pdfIn PDF document text
    • http://naturalik.fun/family_chantel_brotherg5mbp.pdfIn PDF document text
    • https://cdn.sqhk.co/devisojop/IiiDeIL/ghost_rider_images_3d_wallpaper.pdfIn PDF document text
    • https://cdn.sqhk.co/girasufu/jicKaJ3/kitoxebidotiririsezozo.pdfIn PDF document text
    • http://geesecam.com/best_deals_on_labor_day_weekend8t4hq.pdfIn PDF document text
    • http://cybety.xyz/konenanutikejuwu7dlhb.pdfIn PDF document text
    • https://cdn.sqhk.co/fetebutujo/bWIlqhi/99230599068.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410201/normal_5ff3db667193a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384159/normal_6003c17a1aa9b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451744/normal_6007145836fd3.pdfIn PDF document text
    • https://cdn.sqhk.co/rosomugimo/c4haEjg/26829121811.pdfIn PDF document text
    • http://baby-slings.ru/tower_defence_king_mod_apk_android_1yqvi9.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/gumegulaxi/26669556830.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/tft_item_guide_new_patch.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_off0000f86b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF86B 5344 bytes
SHA-256: 611aca907f272b3584d8652dedeefb31f6752255071c54d5eb580c7b2e0aedd4
font_01_sfnt_off00010a96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A96 10204 bytes
SHA-256: c25c3c9439fbcef70c3ffb851530806c92769fde87ff1ea57b2f96f6ab9488fa

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