Malicious PDF — malware analysis report

Static analysis result for SHA-256 56ac2962da01561b…

MALICIOUS

PDF

73.2 KB Created: 2021-04-04 03:46:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c0111bbee4761a882a216dfabcc2ee74 SHA-1: 81fd5dc64cb7750f3015f14bfbd394f71d0cf19b SHA-256: 56ac2962da01561b64a6efe179ab6c975fe4ffaa6fda460be9a545bb39f800a3
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 0.9998

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
  • 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://lozipotod.ru/strik?utm_term=is+love+is+a+fallacy+logical PDF link annotation
    • https://cdn.sqhk.co/muvotugi/Wbghjgv/pokorugagegezukijalof.pdfIn PDF document text
    • http://rekopeza.22web.org/sap_bpc_10_epm_add-_in.pdfIn PDF document text
    • http://interbankdigital.com/663054565048q6fc.pdfIn PDF document text
    • http://ukranews.icu/41907894126bfatp.pdfIn PDF document text
    • http://denizan.com/mens_haircut_fade_or_taperp0jnv.pdfIn PDF document text
    • http://salea.site/26932152283shsa0.pdfIn PDF document text
    • https://cdn.sqhk.co/kimejijomaki/Mhe4ahh/sponge_granny_mod.pdfIn PDF document text
    • http://copyright-security-ig.com/86416060385sjxkx.pdfIn PDF document text
    • http://coolstudent.space/interview_meaning_and_typesjnkc5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367305/normal_5ff8b2a4462cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530036/normal_601b05ca3af4a.pdfIn PDF document text
    • https://cdn.sqhk.co/voxedifi/hje4qid/leapfrog_3d_learning_system_pink.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/74d8b778-1739-42e2-a2ad-e41b3873137d/todaxasimiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7928640-3300-461d-abc9-05c5b3d73faf/vebilizofazuro.pdfIn PDF document text
    • http://mukexojot.rf.gd/amber_delivery_menu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abe0b0d7-5401-4ceb-80c7-0e61e0d589ae/burger_king_crispy_chicken_sandwich_recipe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b134546e-f30c-4cf2-ba14-af3b68d9dd0e/how_to_pair_jaybird_x3_to_a_new_device.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/682eaf45-439a-4a8c-888c-d01b8e50d1f2/sibexuwugobaveku.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_off0000e20d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE20D 5052 bytes
SHA-256: f3fb195530bb75e81d67fe730171746a0ee6697b109ac613b48fc2e263f0eb56
font_01_sfnt_off0000f36e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF36E 10832 bytes
SHA-256: 19af42447773911a1fab5c4f3faf84f8f815ffb9171f0b5de6cdd54c479f4d8f

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