Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ca5ec7142c0f226…

MALICIOUS

PDF

132.3 KB Created: 2021-03-25 18:13:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1b82dc9e108994e2de4eec466b071b6 SHA-1: ed9abd1c20ab420cf0caf5cdd76cdec347dac84a SHA-256: 3ca5ec7142c0f2268ff698e997df0b7e6e38e6491a54238f33e2b0ee3a90b56a
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, with the primary URL pointing to a suspicious domain. ClamAV and ML classifiers also flagged this file as malicious, specifically as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/award?keyword=astounding+science+fiction+magazine+pdf
    • https://pasorizafam.weebly.com/uploads/1/3/4/0/134096756/gafikorowimip_xadug_sozidebu_bumikimugemika.pdf
    • https://cdn.sqhk.co/gabazumad/cigM4gj/smart_launcher_5_pro_review.pdf
    • https://cdn.sqhk.co/rasetiwulipu/jCaHhjc/kung_fu_do_fighting_download.pdf
    • http://byseles.xyz/tusajarosmp5sy.pdf
    • https://vasefifux.weebly.com/uploads/1/3/1/3/131382239/8484d.pdf
    • http://instapriz.online/83181319921naytz.pdf
    • http://gvidilon.ru/oracle_12c_sql_performance_tuning_guideodk3u.pdf
    • http://wersita.space/rakadoku5tc3u.pdf
    • https://cdn.sqhk.co/jujejorule/wTgjegc/basurotanepetow.pdf
    • https://cdn.sqhk.co/jaxabofapuw/jjf7ggE/90567123293.pdf
    • https://cdn.sqhk.co/pazakazagoz/giMGgi4/3607409451.pdf
    • http://goldenframecollision.com/5635357358buir.pdf
    • https://besugadofozoxi.weebly.com/uploads/1/3/5/3/135396803/ab44bbaf9b9e.pdf
    • https://cdn.sqhk.co/turovonunido/qMidjfk/mumomar.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://nelarigutixus.rf.gd/ge_cabrio_washer_manual.pdf
    • http://pemisikozawefa.epizy.com/wegenugi.pdf
    • https://e3055f73-6236-423b-b810-4bc1a15f300f.filesusr.com/ugd/fa12d1_c5ca799a4f3a4762a956e5550840cd7a.pdf?index=true
    • http://gisipusizen.rf.gd/applicability_of_gst_audit_report.pdf
    • https://d4180a97-8dd0-4bf1-9e2f-d1b128d1a64d.filesusr.com/ugd/ae059d_f9c7ea2954bc4d748e5c8afe4917fb4f.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001bc21.bin
cd38f9ecfb7c4e97a433da939f0e6062d8cde6403fb59fad8034b5a6e75e1f78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BC21 5268 bytes
font_01_sfnt_off0001ce01.bin
581425bdf3dce336d0ed25bab90c7811d84f5932fa99fccd88e42ea28f63cc74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1CE01 11552 bytes
font_02_sfnt_off0001f52c.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F52C 4324 bytes

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