Malicious PDF — malware analysis report

Static analysis result for SHA-256 a19f4d1f0c2f3d7d…

MALICIOUS

PDF

74.3 KB Created: 2021-03-11 11:25:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 1beca81b591dc01b695ae70c1db5b317 SHA-1: 64e2064bff8873e317cb793366a66ab4cddab3e6 SHA-256: a19f4d1f0c2f3d7d7c6d4cd8dee2791ef6d44069c61503f2660ae204bbec4b41
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 by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier also indicate malicious intent, specifically as a phishing trojan. While no scripts were extracted, the presence of numerous external URLs points towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://dugedepap.ru/strik?utm_term=nova+390+pc+paint+sprayer+parts PDF link annotation
    • http://service-hire.com/41770664379ej6gk.pdfIn PDF document text
    • http://jobopenufa.iblogger.org/12504905341.pdfIn PDF document text
    • http://ryukzak.digital/analisis_de_mallas_en_corriente_alternaj7ras.pdfIn PDF document text
    • http://ukranews.site/tafemidebelelondec1h.pdfIn PDF document text
    • http://zizaburixakog.iblogger.org/xexukaf.pdfIn PDF document text
    • http://tradestaroffice.com/free_fire_safety_download_for_pcs3tel.pdfIn PDF document text
    • http://lovechat24.club/95312639719b9t4o.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/vitelitubovuluj/bypass_gastrico_tecnica.pdfIn PDF document text
    • https://2a085669-a8dc-40eb-b1d3-71ea9d660f60.filesusr.com/ugd/cafc24_f261ef3ef5b74bb985cddd3fd46d79ef.pdf?index=trueIn PDF document text
    • https://667abc8f-92ca-45d9-bc9d-789c80a68858.filesusr.com/ugd/dcd78f_72232017bc684dca907fbb0e88ab8749.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/94199958405.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/health_information_technology_jobs_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/logezoliv.pdfIn PDF document text
    • https://54e283d8-6946-47af-b6e3-c78582312647.filesusr.com/ugd/22cd47_11b894e7e4e94ce3a70707cbfac2adc0.pdf?index=trueIn PDF document text
    • http://magikid.epizy.com/bricks_breaker_shot_apk_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/gelurewusipuwufib.pdfIn PDF document text
    • https://d12e84a0-9808-45da-82c6-613dfe540d1b.filesusr.com/ugd/dc8a8e_cef2a28ef92d4ea09e0258cf6b1e3d50.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/sample_newspaper_report_on_road_accident.pdfIn PDF document text
    • https://2080fafa-2491-4ac3-8118-a138f33bff34.filesusr.com/ugd/822ecd_4336e9f4a1a34674a925db32d59c0ef9.pdf?index=trueIn PDF document text
    • http://pariwexeral.epizy.com/how_to_use_scalp_detox.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_off0000e4a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A3 5488 bytes
SHA-256: 446cf7f09ac9a96423a5d16b3cbb5f301bbb23ad17cbc87e31b9ca6c27c55902
font_01_sfnt_off0000f769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF769 10796 bytes
SHA-256: 3da4b62353a52e6f894b080157ab84f73da517188493609fa91251ec00249cb3

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