Malicious PDF — malware analysis report

Static analysis result for SHA-256 8afeec79f60b10aa…

MALICIOUS

PDF

94.1 KB Created: 2021-03-10 01:50:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3f180c6a9b68b107d8a75107da07222c SHA-1: 909e90f0ad77a4265bef2de4c0f0042ea8a6a014 SHA-256: 8afeec79f60b10aa664d4ffd57759c906b01294f6779e6bbe36dd7991b482f1c
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://golowaki.ru/strik?utm_term=auld+lang+syne+beginner+piano+sheet+music PDF link annotation
    • http://bagomebefekixob.getenjoyment.net/polaroid_originals_color_film_for_sx-70_6004.pdfIn PDF document text
    • https://cdn.sqhk.co/bujerinalo/Cjjhvjh/skull_game_arcade_games.pdfIn PDF document text
    • https://cdn.sqhk.co/sifolilo/ggUzgff/32616387634.pdfIn PDF document text
    • https://cdn.sqhk.co/lenubire/fgeWhbc/sawokimarineti.pdfIn PDF document text
    • http://gazuravalo.iblogger.org/apc_back-ups_es_650_blinking_red_light.pdfIn PDF document text
    • https://cdn.sqhk.co/wisivelu/gdIojiP/rexirukixonasabofanide.pdfIn PDF document text
    • https://cdn.sqhk.co/badilapo/gYBkVTS/bts_seoul_music_awards_2019_performance.pdfIn PDF document text
    • http://sapubuwit.22web.org/fagawapi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6f847715-c85a-45d9-ae5c-7c68cc800588.filesusr.com/ugd/6e100b_75d13f29424345c2a765e9ffbad7ce70.pdf?index=trueIn PDF document text
    • https://200ee3fc-349d-4871-b5c3-2c1c69b60476.filesusr.com/ugd/7b00a0_81c2df90105749448621b8399a2b6a3c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f98ee6c9-86a5-4331-a6df-4d72aaadf2db/70746602653.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02427c70-ee05-4110-90e5-497814e28d0d/world_of_warcraft_chronicle_volume_1_read_online_free.pdfIn PDF document text
    • http://nupadamemal.epizy.com/westminster_abbey_official_guide_book.pdfIn PDF document text
    • https://44f39d5c-a655-4437-91b6-62b11e148e71.filesusr.com/ugd/eb4c03_377e9c475f6f4b3f89446e42cd73cef5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1a9bb7b-1fe7-4ad1-878c-f6e1da0d9201/debudutepiv.pdfIn PDF document text
    • http://sisogakaxu.rf.gd/python_machine_learning_book_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a74988fa-a8b1-4480-bb6f-50b003f54a9a/63348406841.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e956a6e2-e685-4cb6-87f9-17b82a8d56f6/singular_and_plural_nouns_worksheet_for_class_5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a1a3a6a-d758-4983-9e78-823822de511b/dunijosusulisetalujekona.pdfIn PDF document text
    • http://zimopup.myartsonline.com/links_awakening_turtle_rock_keys.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_off000130ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130CA 5720 bytes
SHA-256: 3d59ae273715d5f67d477b1b8825ffde654c6642fbb2d94abc9e7fad7adaf2ad
font_01_sfnt_off00014412.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14412 12868 bytes
SHA-256: b2c0d3a870b008736b49f4107571304cdc1389efbb83eb29c034f0b69edcf692

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