Malicious PDF — malware analysis report

Static analysis result for SHA-256 adc54f51f29b657b…

MALICIOUS

PDF

73.5 KB Created: 2021-03-09 04:18:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 25a7ab51cc1b40b6d489bf613ac2647f SHA-1: a78a2ecfdaf42b265813d1698ea115a67313bff1 SHA-256: adc54f51f29b657b81808afb2e25db7386db5fd4a47809942591870de5ae5518
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, including a known malicious redirector. The document body, though heavily obfuscated, appears to contain keywords related to software downloads, suggesting a lure for users seeking specific applications. The presence of a malicious redirector URL indicates an attempt to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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/123?utm_term=alight+motion+mod+apk+no+watermark In PDF document text
    • http://riwalimuj.scienceontheweb.net/34839019108.pdfIn PDF document text
    • https://dovavifedudefew.weebly.com/uploads/1/3/2/7/132710721/a8746.pdfIn PDF document text
    • https://jedewudozoj.weebly.com/uploads/1/3/0/7/130739070/biwitakolasuxigo.pdfIn PDF document text
    • http://fisujerekuvij.getenjoyment.net/1168657634.pdfIn PDF document text
    • http://vexetifiridik.mypressonline.com/galileo_galilei_sidereus_nuncius.pdfIn PDF document text
    • http://warupipujamoru.sportsontheweb.net/vokatesijotukub.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/fakuguvil/49773670481.pdfIn PDF document text
    • http://mawokale.myartsonline.com/will_school_fees_be_reduced.pdfIn PDF document text
    • http://tukekutiwele.rf.gd/6724837046.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/colonialism_and_the_city_question_answer.pdfIn PDF document text
    • http://punolubumima.epizy.com/kezimuwuni.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/ronutujewowabadumo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bda3b462-d3e0-4603-bb1a-125079b9980b/shark_rotator_lift_away_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c51949ee-cce1-4ce4-847f-cf83306433d8/winters_bone_plot_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/wulanirozatukojepe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ddbb257-5614-4a52-aa4f-1133e251cd16/meal_plan_options_tamu.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/97663346.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c8017f1-9b07-474f-b0d1-019da6f48ab9/tenemo.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/baby_girl_christmas_outfits_3-6_months.pdfIn PDF document text
    • http://vurisadazuxe.epizy.com/antiretroviral_drugs_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/sublease_agreement_nyc_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/lilojiwenonuzozugasuge.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_off0000e3d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D9 5340 bytes
SHA-256: 9c40feb301c31b27ededd12caab7dd405421b6c1f30d5aa25e4e29c0369f86d7
font_01_sfnt_off0000f5e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E2 10148 bytes
SHA-256: 5dc7b320cf3cbdccd7c78df6091c6a829195ca02cbbd7adaa8273a14315bc006