Malicious PDF — malware analysis report

Static analysis result for SHA-256 c38e2eb30d165013…

MALICIOUS

PDF

83.8 KB Created: 2021-03-22 04:47:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9169cbb7a88a841ffe0ee182a4f87d6e SHA-1: 11cf2133cbeb2e4fde6f5aa5484d628a8fc236bf SHA-256: c38e2eb30d165013860123bfbd3e6bf1ecf222b4e1d216fe81e40e935101d1b6
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 0.9992

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 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://jottigo.ru/123?utm_term=illustrator+templates+timeline PDF link annotation
    • https://cdn.sqhk.co/remimidotomi/jaEvTic/neighborhood_watch_signage.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458122/normal_603a44a3a7e65.pdfIn PDF document text
    • https://cdn.sqhk.co/zejizoguzut/Joggchb/happy_wheels_unblocked_demo_hacked.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449397/normal_5fe05f5059fed.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopiroxab/ghdRYCw/xuvelimol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417413/normal_5fd6258ed77c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365542/normal_6010a2734a0b7.pdfIn PDF document text
    • https://cdn.sqhk.co/sofizagumup/ggWjccu/jiwewojufuvezirozova.pdfIn PDF document text
    • http://lunatan.medianewsonline.com/2008_honda_cr_v_maintenance.pdfIn PDF document text
    • http://zibepifutidi.sportsontheweb.net/xebevoso.pdfIn PDF document text
    • https://cdn.sqhk.co/wibononuve/hiicvgi/real_moto_brasil_jogo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470035/normal_600d380d146bf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://buwepuxaj.epizy.com/bryce_canyon_hoodoos_formation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcc7e65c-4a73-4eb1-a82c-82d06b31aaf5/what_is_positive_and_negative_space_in_interior_design.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/391f0990-4046-4511-bde1-254c01223679/alan_watts_chillstep_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a657068-b004-42d9-a4b1-191fa5b05ba9/bq-cc_17_sba4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c935283-0135-4d95-916e-82bc8a489271/what_are_the_stages_of_grief_and_loss.pdfIn PDF document text
    • http://lumosaneja.onlinewebshop.net/62373633240.pdfIn PDF document text
    • http://gowefemum.epizy.com/95066060133.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75fd2add-b272-41e4-8bf2-27c080b4a4f0/what_is_rojava.pdfIn PDF document text
    • http://dexixikix.epizy.com/ruvot.pdfIn PDF document text
    • http://gowamatul.epizy.com/1838687750.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9593630-95c9-4a37-952a-abcb25d735fe/bose_wave_music_system_iii_cd_not_playable.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_off0001110e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1110E 4904 bytes
SHA-256: d246bfd0dbef0c444b15a6572c02453cb2dc65dde2dc2af53b14bdfc8a6c58cd
font_01_sfnt_off0001219c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1219C 9412 bytes
SHA-256: b3a8df2067217d38b7a41d854909553492c3ec14abd07637519be904b280aac5

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