Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f79d6bedb8b3717…

MALICIOUS

PDF

77.1 KB Created: 2021-03-31 04:27:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 465becf47b98ed844dba7ae617764544 SHA-1: 3060959a949e83d21f70f20914dd931be9452fa5 SHA-256: 7f79d6bedb8b3717a6c929db783c9a97ba7fd8cecbac7187d9234c17c2ac286f
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 0.9997

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://kuzutuzo.ru/wix?keyword=soul+calibur+android+apk+download PDF link annotation
    • http://sacredname.ru/692067731544rpjo.pdfIn PDF document text
    • https://nuvusutapisi.weebly.com/uploads/1/3/4/4/134460305/3831529.pdfIn PDF document text
    • https://cdn.sqhk.co/sirepajaku/hfwgdlm/zujanje_u_uhu_uzroci.pdfIn PDF document text
    • http://ekzo-fruit.ru/lowes_dreamline_bypass_shower_doorsj5n6d.pdfIn PDF document text
    • http://promooffer.site/lg_inverter_direct_drive_error_codes_dishwasher4z2ol.pdfIn PDF document text
    • https://sutujiwujuso.weebly.com/uploads/1/3/5/3/135390810/tobariba.pdfIn PDF document text
    • https://zunexoxefa.weebly.com/uploads/1/3/5/3/135340588/wokatejoxe-dibok-mulunug.pdfIn PDF document text
    • https://cdn.sqhk.co/kapipota/jaTb7FH/stink_and_the_freaky_frog_freakout_main_problem.pdfIn PDF document text
    • http://verifybadgesbusiness.com/rush_hour_traffic_toronto_airportg514z.pdfIn PDF document text
    • http://ipoteka.net/504243732789g25e.pdfIn PDF document text
    • http://mmamba.ru/c_programming_from_problem_analysis_to_program_design_8th_edition_by_d.s._malik3s2c9.pdfIn PDF document text
    • https://cdn.sqhk.co/dugelabomaw/lOSzjer/369903404.pdfIn PDF document text
    • https://cdn.sqhk.co/zutigaku/hih3nhb/57023169493.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/how_many_days_can_a_dog_go_without_food.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2ea8bae-644e-4712-ab34-4ae628129994/how_to_pass_the_vision_test_at_the_dmv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5479bef8-0537-4453-b60a-ca1458e38a45/whirlpool_gold_dishwasher_fault.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/chaudhary_charan_singh_university_ba_online_form.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/john_deere_425_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/16275398409.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f794601-513c-41d2-8e1a-12c18f49692a/24739615957.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eea5b3e2-0424-4228-a84c-bf995e7e2b45/anker_a7908_not_turning_on.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_off0000e4d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D2 5288 bytes
SHA-256: 59527e770441e00286b8b678a151f5cea5dca789aae913cf3a38c88e937a6d6d
font_01_sfnt_off0000f6ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EA 14988 bytes
SHA-256: 92cc1abed3a39ee5296f4a55563bb0d4d73c2a3c6d324d7e834bc54316490596

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