Malicious PDF — malware analysis report

Static analysis result for SHA-256 68552ddfa2b707ca…

MALICIOUS

PDF

72.1 KB Created: 2021-03-31 00:55:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9a18fdd6a2b779ac8596cf7352a0b8b7 SHA-1: 859667a3010abc5dfd358f166974f7a9a16d7fde SHA-256: 68552ddfa2b707cab4628e15f1d405b7d38e050b7410bfa32c1adf8d30ff2b36
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 0.9991

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://bologen.ru/wix?keyword=handbook+of+interventional+radiologic+procedures+pdf+free+download PDF link annotation
    • https://cdn.sqhk.co/wopeporamo/ibhwhgM/swordsman_marvel_wiki.pdfIn PDF document text
    • https://cdn.sqhk.co/wavudasawete/o9jfjjr/wakisuxiza.pdfIn PDF document text
    • https://cdn.sqhk.co/fagaxirupunu/gmieSsK/crossfire_volleyball_mn.pdfIn PDF document text
    • https://cdn.sqhk.co/bopelara/ieGFIRH/90549199498.pdfIn PDF document text
    • https://cdn.sqhk.co/zebimapajod/dphbR4v/pesivagafikaj.pdfIn PDF document text
    • https://cdn.sqhk.co/lukavago/f4sgiIv/3d_photo_lab_effect_apk.pdfIn PDF document text
    • http://galapokebalanu.22web.org/56787223681.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472760/normal_602b2d75dcbd6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391898/normal_5feafdd7a9526.pdfIn PDF document text
    • https://cdn.sqhk.co/vujixete/j6fPgh5/46972912650.pdfIn PDF document text
    • https://cdn.sqhk.co/wubunepan/8ibibgj/norwegian_cruise_line_work_from_home_pay.pdfIn PDF document text
    • https://cdn.sqhk.co/sifalavuxozo/ghianig/prestonplayz_logo_svg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461516/normal_5fcda31ccf4dd.pdfIn PDF document text
    • https://cdn.sqhk.co/fokigegoma/RrPMhd5/best_tamil_romantic_songs_ringtone.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/047c1142-8811-4c02-b1c3-c8ee78f8dcdd/logitech_wireless_keyboard_k360_black_usb.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/kulewudilewopolowoz.pdfIn PDF document text
    • http://dekidad.epizy.com/checklist_template_ppt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faca40bc-aefe-4181-9e3c-5eb3d1933703/program_genie_excelerator_keypad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97d69f3e-9aea-4bf2-9536-a36c09732f10/34579512997.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/sovivawafokepo.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/sifanerasenovujuxazutezo.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/zebititowomasufuzepoz.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/milling_speed_and_feed_calculator_free.pdfIn PDF document text
    • http://lumaxixi.epizy.com/tuzobufosuxexoxumagij.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_off0000dcd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD0 5640 bytes
SHA-256: 503e0394b3ee3c14f0b4c1dc8f7c3fff07f4cd8043380da83c22c025ffb67f41
font_01_sfnt_off0000f020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF020 9928 bytes
SHA-256: 88e91180ebf85c81945c9248b16a0b3b5aff018541bec183be851f3e404d1ce6

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