Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e84993793bad773…

MALICIOUS

PDF

68.2 KB Created: 2020-12-18 12:40:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: cf07429032c46c2ec1771e4635fb2f2e SHA-1: e90147291f7a9f042c0dfbbb19acf76eb5a048f9 SHA-256: 7e84993793bad7735e746dce26cb42c6a7b153e89046ad6cffdc4ed7dddfa737
192 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to "hack clash royale apk ios", suggesting a lure for users seeking cheats or exploits. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, but the presence of malicious redirector links and the lure text strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/123?utm_term=hack+clash+royale+apk+ios In PDF document text
    • https://raminatu.weebly.com/uploads/1/3/4/5/134579417/d98dd5006341.pdfIn PDF document text
    • https://tolajugim.weebly.com/uploads/1/3/4/6/134647220/tanimewum_lozale_tipaxonilixoz.pdfIn PDF document text
    • https://nazasakodaz.weebly.com/uploads/1/3/4/6/134667833/9743087.pdfIn PDF document text
    • https://kapelivoxiri.weebly.com/uploads/1/3/4/0/134040857/rixezusiduxuxo.pdfIn PDF document text
    • https://xuzutewoduka.weebly.com/uploads/1/3/4/3/134364923/liverozi.pdfIn PDF document text
    • https://zusiwugebibod.weebly.com/uploads/1/3/4/4/134484471/jaronoxe_retur_zalitoxemi.pdfIn PDF document text
    • https://velizixevapejaj.weebly.com/uploads/1/3/4/3/134376636/mozatibopanijenorovo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415292/normal_5fcebfcc43381.pdfIn PDF document text
    • https://legufita.weebly.com/uploads/1/3/4/8/134866723/dujidaf.pdfIn PDF document text
    • https://jufopikigon.weebly.com/uploads/1/3/4/3/134309667/vuwonixo-nelubulata.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/dapekufoxiraku/89783512551.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c66b27a199023ab4af32/t/5fc0eea4e6d49a06bbb3ba85/1606479524899/substitute_for_dry_sherry_in_french_onion_soup.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc55ad4085bf90c0e1ac87b/t/5fd709233ebe04163176bc14/1607928107107/super_chibi_knight_free_full_version.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10ea416f6d44b07bfaa09/t/5fc4aa5008845d09241dde2c/1606724177170/how_to_uninstall_skyrim_mods_manually.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc114788ef7301f8b11b9bb/t/5fc31a619ee0f32b87b95a63/1606621797928/nemufevurakelojiruxew.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc578abd49dd1244753261b/t/5fc7eca362442c4b4da98ed9/1606937764369/hd_cartoon_wallpapers_1080p_download_full_for_mobile.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/sofekerop.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_off0000cba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA3 5148 bytes
SHA-256: 6b680e58bcb488d078067b1d983d0bcc699e3c4c89bc7bd20d1f8f9001540c1d
font_01_sfnt_off0000dd25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD25 11476 bytes
SHA-256: 1202a47f3b6064f33860610a61c778d2659addb33ff3c50cab27e2c763eba8d4