Malicious PDF — malware analysis report

Static analysis result for SHA-256 d188343953705bdd…

MALICIOUS

PDF

72.6 KB Created: 2021-01-04 17:03:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: b7403ce2de082509405a807fcc6a5c42 SHA-1: 994a3c0c034075d1d27172117afe649a94a6591a SHA-256: d188343953705bdda42da1df97cd8f5f1919a0f3902685df365da5725da40805
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. Another critical heuristic identified a link farm, suggesting an attempt to manipulate search engine results or distribute malicious content. While no scripts were extracted, the presence of numerous links and the ClamAV detection strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ggtraff.ru/aws?utm_term=handwriting+sheets+for+left+handers In PDF document text
    • https://bipinudaw.weebly.com/uploads/1/3/4/7/134718108/9862224.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/52d873b8-e27c-4d7e-a21a-5488fbee4d2b/eating_clean_for_dummies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96a12abe-8786-40bf-9e83-9336dc2b597d/5e_small_creature_size.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/276141cf-29a7-429e-9d3d-3bfcf68bc234/mercy_hospital_rogers_arkansas_medical_records.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/tamil_tv_channels_app_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b509f0f9-3c19-4baa-8972-a2831d14c5a2/16423301335.pdfIn PDF document text
    • https://s3.amazonaws.com/lirivugu/tobek.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/princess_coloring_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/jabagerexi.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/ny_daily_news_sports_reporters.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/broward_2019-_2020_school_calendar.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/glencoe_7th_grade_math_book.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/kollywood_box_office_report_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/jetenazax.pdfIn PDF document text
    • https://s3.amazonaws.com/liwara/fajumurozupu.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_off0000dfca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFCA 5220 bytes
SHA-256: 21b9d7ff45dcb788a929e42e8fc63dfa79dec96947cfc2a19bd0dedd0ac97330
font_01_sfnt_off0000f19a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF19A 10392 bytes
SHA-256: c6f42d8b614cc8978a35f9c2e9ca5eb916a9bd250e2722034e4af1ae351620ed

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