Malicious PDF — malware analysis report

Static analysis result for SHA-256 6147cfbb1a06d42c…

MALICIOUS

PDF

77.0 KB Created: 2021-04-05 08:22:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4d91be41435b7774d72d8873fd3e1a70 SHA-1: 5b3b3e94d60d08839ff8328905627efd097de8e9 SHA-256: 6147cfbb1a06d42cf306fdf370cd2456713f46cf3e0ddce7b068febd4ab153aa
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 0.9995

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://dafemum.ru/123?utm_term=backbreaker+2+apk+full PDF link annotation
    • http://complerbnp.com/hp_6700_printer_errorn4f58.pdfIn PDF document text
    • http://naturfresh.space/98577219825ux5hb.pdfIn PDF document text
    • https://garusase.weebly.com/uploads/1/3/4/6/134634063/pisuwotonobulo.pdfIn PDF document text
    • https://cdn.sqhk.co/mojupesonon/J9kpgc0/68266966435.pdfIn PDF document text
    • http://larts.digital/video_editor_software_for_android_mobileyx5hl.pdfIn PDF document text
    • http://summ-ita.space/bella_and_the_bulldogs_cuckoldd1twi.pdfIn PDF document text
    • http://francobusiness.com/60077705718qxn56.pdfIn PDF document text
    • https://cdn.sqhk.co/pugirunosamo/CAjigdH/geometry_dash_lite_online_unblocked.pdfIn PDF document text
    • http://nanolenka.xyz/giletekesetodux8m0ci.pdfIn PDF document text
    • http://paxabak.mypressonline.com/vojabadesukabigagagugop.pdfIn PDF document text
    • http://zemesod.getenjoyment.net/5209388399.pdfIn PDF document text
    • https://cdn.sqhk.co/govulasem/gzgg8jd/barbershop_cast_2013.pdfIn PDF document text
    • http://ceter.xyz/rusegimabanejc9fbj.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/id1hdVu/24470027597.pdfIn PDF document text
    • http://snail-case.store/craftsman_25cc_weed_eater_carb_adjustmenta0rin.pdfIn PDF document text
    • https://cdn.sqhk.co/kelopifagisu/3W66P4a/storylineonline_rainbow_fish.pdfIn PDF document text
    • http://axecheat8.xyz/how_to_make_a_budget_on_quickenj3p71.pdfIn PDF document text
    • https://devojakosumu.weebly.com/uploads/1/3/5/3/135314674/temik_berukesipuk_poxebubep_kegulewarogip.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/0f1a4424-5fa5-49ad-bf54-e26b0b16be3d/rl_bill_of_lading.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8b9b8d0-b502-4508-853a-72a374f9919d/springfield_87a_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99ecc5e1-adc1-4513-a3fd-64fcba264a0f/8754836692.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/911cc524-ecf2-49b4-a612-48cfd69d2fb9/who_was_originally_cast_as_tessa_in_after.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_off0000ed82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED82 5216 bytes
SHA-256: 76620a6b8bf6e7da274eccd103503f8433722aadc6cd6af2e21172ddf4da71e9
font_01_sfnt_off0000ff54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF54 11456 bytes
SHA-256: 6ba16b9dd35c95ad440b963c4e7b8615057be8e3f81b0cb76fa900762fd79101

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