Malicious PDF — malware analysis report

Static analysis result for SHA-256 619aa69c3f6e0c8d…

MALICIOUS

PDF

91.7 KB Created: 2021-04-05 06:04:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 93b06719adbc3762a83ee911b7a36396 SHA-1: 1c8d621d52bc940d8c1891d3a43fcabdbe1a5923 SHA-256: 619aa69c3f6e0c8df78ea589ff484bb04a0b544fafd119b2ad8cafe3845f609b
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to potentially malicious domains, suggesting it acts as a lure to external resources. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the conclusion that this document is designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/award?keyword=life+cycle+of+hookworm+pdf PDF link annotation
    • http://uanews.website/xedizaresazemenabikougnld.pdfIn PDF document text
    • http://mmmuuuue.space/monstercrafter_mod_apk_latest_versionjmixw.pdfIn PDF document text
    • http://fasadi.site/go_math_student_practice_book_grade_461lil.pdfIn PDF document text
    • http://present-mag.ru/wewelurowalupepurerekewxkoi4.pdfIn PDF document text
    • http://future-techno.ru/rukadidefazuja6dzf8.pdfIn PDF document text
    • http://speak4pro.com/fukoza23boz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453102/normal_600c54861745a.pdfIn PDF document text
    • http://216tilford.com/gatemevuwdd2me.pdfIn PDF document text
    • http://doordash.link/dofuzoxkv41.pdfIn PDF document text
    • http://secureappeal.com/xetedudezonauzowm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470696/normal_5fda661fddb28.pdfIn PDF document text
    • http://towufato.mywebcommunity.org/98197706808.pdfIn PDF document text
    • http://kevufeduwatawos.mypressonline.com/nomiwuwikotidivenetow.pdfIn PDF document text
    • http://auth02mobility.com/best_beaten_down_stocks_to_buyzhwyt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://80b2a579-f9ed-4aa0-b91a-ac3c8973c086.filesusr.com/ugd/353d00_5c0709bc38634e4bbec13e41d946338a.pdf?index=trueIn PDF document text
    • https://4c982f7a-b72b-446d-8c7a-5e2d6818c0db.filesusr.com/ugd/519a61_f2a1be2c398e4da5b6de6f91e0760c32.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011bed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BED 4808 bytes
SHA-256: d830bd7d0ff408609467cf7e5aa0c3b2ee237f407b8ebbfb904c2ccc1207365b
font_01_sfnt_off00012c52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C52 11540 bytes
SHA-256: bdd5f2a21d8184188eb68a5c470706b03c164aadf31db0835caa453ca9bdea6d
font_02_sfnt_off0001539e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1539E 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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