Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ca51686f805a7ba…

MALICIOUS

PDF

79.2 KB Created: 2021-03-22 08:38:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f88524ad9b629570995b1097ad590eaa SHA-1: c3f2933521f9fd01259d8340f79c1e7c5171476b SHA-256: 4ca51686f805a7ba80f0ab1d052eceecda9376f14e5cce9b81719c51ea3ae8a8
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure (https://crophysi.ru/wix?keyword=san+andreas+girlfriend+guide). The document body, though partially corrupted, suggests a lure related to game guides, likely to trick users into visiting these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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.
  • 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://crophysi.ru/wix?keyword=san+andreas+girlfriend+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4481834/normal_6019730c1f8d3.pdfIn PDF document text
    • http://wuxixezigitezir.mygamesonline.org/autocad_2020_notes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469623/normal_60434dcb1d2d9.pdfIn PDF document text
    • https://cdn.sqhk.co/xotakuzazuf/ghrNNH1/74198489796.pdfIn PDF document text
    • https://cdn.sqhk.co/ragebobeb/5mShdgj/ckz_origins_2_mod_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xijogedobu/jgcstgf/3928295747.pdfIn PDF document text
    • http://xteenware.online/356558865193sucu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488815/normal_605201f1a8edd.pdfIn PDF document text
    • http://fullpisetc.ru/52965728453a32hk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391620/normal_6044250f7a09d.pdfIn PDF document text
    • http://ladujose.sportsontheweb.net/graphic_design_jobs_atlanta_ga_entry_level.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455902/normal_601d61bd2f839.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426085/normal_5fe77ade03519.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382420/normal_60239ef42c2d3.pdfIn PDF document text
    • http://jadogaxarabu.mygamesonline.org/power_cooker_plus_8_quart_pressure_cooker_recipes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403946/normal_60478ff48de21.pdfIn PDF document text
    • http://azules.ru/76902920590rwvfy.pdfIn PDF document text
    • https://cdn.sqhk.co/sogefuluf/ghY9wih/4743648199.pdfIn PDF document text
    • http://instapriz.online/48722449398vx6ri.pdfIn PDF document text
    • http://matawobedopikam.mywebcommunity.org/brush_calligraphy_for_beginners.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390680/normal_5fe7db5b92856.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tivapatovike.epizy.com/asme_b31_3_em_portugues.pdfIn PDF document text
    • http://jazoxuxorilule.epizy.com/usarec_3.2_example.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_off0000f7d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D4 5176 bytes
SHA-256: 5ee27d0a1b856dea92e354b8203c72d0a9975b5485844af476a64e433e81c3b2
font_01_sfnt_off0001097a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1097A 11280 bytes
SHA-256: 75751fd0805a6f5caefd3a7b4b11eecab1de609c305cf0b029040e8b5b88e2d0

Open this report in the interactive analyzer, or submit your own file for analysis.