Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c22bdc4f57d8d7d…

MALICIOUS

PDF

79.4 KB Created: 2021-03-19 11:32:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e7eb41556d709d17bdf0d9cc11216f5f SHA-1: b2559a2d69e9d927cf86a5db2e5fcd68b41ce4d7 SHA-256: 1c22bdc4f57d8d7da463d62d9a573255495a117c3f86d5be0db54fd292e172ca
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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://dafemum.ru/strik?utm_term=target+starbucks+barista+benefits PDF link annotation
    • https://cdn.sqhk.co/judawube/cjdWjdw/survival_police_prison_escape_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/dujovosu/AVhfV2H/free_vcf_file_to_csv_converter.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385010/normal_60375fb8d839b.pdfIn PDF document text
    • https://cdn.sqhk.co/gagobuniponi/hi6TZje/nupibixixabonumikejereg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403679/normal_5fdc1f8d355f6.pdfIn PDF document text
    • http://bitiwiz.medianewsonline.com/nowenajivideri.pdfIn PDF document text
    • https://cdn.sqhk.co/sisamide/ciigfKD/gabuvovuxe.pdfIn PDF document text
    • https://cdn.sqhk.co/zumedizojas/9jfhjji/airbnb_app_android.pdfIn PDF document text
    • https://cdn.sqhk.co/pesamelez/uzjdNhi/67359353889.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457008/normal_60167e0192103.pdfIn PDF document text
    • https://cdn.sqhk.co/kunimanujage/nhihhWn/76439955937.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419818/normal_600d47b317bd1.pdfIn PDF document text
    • https://cdn.sqhk.co/jupufopil/dHhUhg8/82110808640.pdfIn PDF document text
    • https://cdn.sqhk.co/nudabesawi/Fmhbgiu/bizipa.pdfIn PDF document text
    • https://cdn.sqhk.co/pixorikibam/KwShjhf/islamic_ringtones_and_songs_2020_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427799/normal_603466ef3f52d.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
    • http://waxozex.epizy.com/3463313748.pdfIn PDF document text
    • http://soxarigur.myartsonline.com/pupazunogaf.pdfIn PDF document text
    • http://lemijafuw.epizy.com/vixetabag.pdfIn PDF document text
    • http://gazezubutajon.rf.gd/iit_jam_mathematics_syllabus_2020.pdfIn PDF document text
    • http://sojisij.epizy.com/vebaretawakan.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE899 4944 bytes
SHA-256: 399b71d2d42c193e535082c244e8ab6249c99dca92fdb47b374ff62a79b5a864
font_01_sfnt_off0000f97f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF97F 11800 bytes
SHA-256: 660b966e9febb34bd12ccfd323557664425f3fe2b1db18d950933c665ff34a84
font_02_sfnt_off0001216e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1216E 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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