Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b549dfb605f2969…

MALICIOUS

PDF

106.3 KB Created: 2021-05-15 23:32:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 55be3f9c8a2b8445e64dcbd12493418c SHA-1: 319f9d4094972937db32bdd02101617880af9b4a SHA-256: 7b549dfb605f296930b1f4a0182accabb074b4fc9199de0421dcbab73be8fa14
66 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 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 0.9987

Heuristics 4

  • 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://nipisod.ru/strik?utm_term=jolee%2527s+dark+fabric+transfer+sheets+instructions PDF link annotation
    • https://kaxozugusejerob.weebly.com/uploads/1/3/1/4/131452826/a1c78af0.pdfIn PDF document text
    • http://pejurazatox.iblogger.org/gafopokasorolesewapu.pdfIn PDF document text
    • http://judijemavup.22web.org/bojodiwisizelasute.pdfIn PDF document text
    • https://gisijenoxumo.weebly.com/uploads/1/3/1/4/131437849/libor.pdfIn PDF document text
    • http://tijudiwulewanuw.getenjoyment.net/zadinerimujepok.pdfIn PDF document text
    • http://xamawigokoke.mygamesonline.org/25917209586.pdfIn PDF document text
    • https://simebofes.weebly.com/uploads/1/3/1/4/131438459/9733791.pdfIn PDF document text
    • http://lamelaw.iblogger.org/best_free_books_download_sites.pdfIn PDF document text
    • http://nigemutekilum.mypressonline.com/free_printable_blank_bingo_cards_for_teachers.pdfIn PDF document text
    • https://sibibogug.weebly.com/uploads/1/3/5/9/135990875/sekalisumusexud.pdfIn PDF document text
    • https://powujuraw.weebly.com/uploads/1/3/5/3/135321569/bedataki-lorerewosi-zunelumotetid-sezove.pdfIn PDF document text
    • http://nawavidosuk.medianewsonline.com/79654879850.pdfIn PDF document text
    • http://sosiwawivijomo.scienceontheweb.net/72280147789.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/1e4ad0e1-f9b3-449f-a2a8-dbc9b23740b7/pemisogozitegurogekeko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1935e2c-1e9a-48d9-b171-13fb5c72de29/fokofujizadaxekejajofod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5401fac-1f1e-4f98-9791-82075a9e646c/dell_poweredge_2950_memory_price.pdfIn PDF document text
    • http://tuxiwifu.rf.gd/31808367916.pdfIn PDF document text
    • http://lutatiduz.epizy.com/char_broil_four_burner_gas_grill_parts.pdfIn PDF document text
    • http://kiwasebax.epizy.com/81181194021.pdfIn PDF document text
    • http://jaxarafepemu.epizy.com/d_and_d_sizes.pdfIn PDF document text
    • http://girofili.myartsonline.com/new_york_city_map_sightseeing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3eb478b2-2f69-4e1f-ace7-d15768443de7/tukiwejafawozevolujafur.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013e4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E4E 2980 bytes
SHA-256: 28ce61e8c5d439b091d20bab30424316fadcc1d950074dfd1126da1d1ceaa02d
font_01_sfnt_off000148ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148EE 5336 bytes
SHA-256: 9d596223d4bb137b4d39bf8ec146dba7f4443f14a5338fc4fef2ba4759bc12e6
font_02_sfnt_off00015b16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B16 12512 bytes
SHA-256: a34ef9c2a10e8a572ee509643c0a4d483a660471112a76b6fc71720aa0bd6e3b
font_03_sfnt_off000185b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x185B1 16060 bytes
SHA-256: d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7

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