Malicious PDF — malware analysis report

Static analysis result for SHA-256 081adc9a9bab4435…

MALICIOUS

PDF

78.0 KB Created: 2021-03-24 09:03:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 3b6d272d5fb79882336776ea12ff5710 SHA-1: 916b3b1b5100bb6ba285b67d030255fe1365b403 SHA-256: 081adc9a9bab44352c7ae5dc76f01ac6752d9e48881768ff1c31445ab69d05ac
66 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one prominent URL pointing to a site that appears to be a link farm or redirector. The ML classifier strongly indicated maliciousness, and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests a deliberate attempt to obscure the true destination or host multiple malicious links. The document body, though heavily obfuscated, contains text related to 'Ragnarok eternal love' and 'wkhtmltopdf', suggesting a lure related to gaming or software, directing users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/123?utm_term=ragnarok+eternal+love+aldebaran+minstrel+answers PDF link annotation
    • http://lijovafe.22web.org/auxiliares_de_comercio.pdfIn PDF document text
    • http://surevixa.22web.org/consumers_energy_report_power_outage_phone_number.pdfIn PDF document text
    • http://nodefiw.medianewsonline.com/46867067357.pdfIn PDF document text
    • http://rowexusaje.mypressonline.com/17671119215.pdfIn PDF document text
    • http://tazibesemelegi.iblogger.org/how_long_to_steam_chicken_in_aroma_rice_cooker.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393483/normal_6055bc8aa68e1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481166/normal_5ff64aa93d15d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/zowejunef/dovuzewexenasutunu.pdfIn PDF document text
    • https://s3.amazonaws.com/zatazewoz/lonidepefixotuf.pdfIn PDF document text
    • http://fiwujugisijema.epizy.com/ayo_and_teo_christmas_song.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/50306641143.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/free_apps_jailbreak_ios_11.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc271506-eb28-4d5e-a5e3-7e3467768dc9/dasuwaduzasosir.pdfIn PDF document text
    • https://4779f2f8-a33e-4327-9c78-21ee0bcf4620.filesusr.com/ugd/31bf02_f828cde3a99645668776a2c96bced6b0.pdf?index=trueIn PDF document text
    • https://3a00e800-a8eb-44ae-aafc-ae9aecab8e06.filesusr.com/ugd/1715bf_5b20d3df20864838b05d16bd7d7367e7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/annamalai_tamil_movie_ringtones_free.pdfIn PDF document text
    • https://46c19374-600d-43be-a5f2-d8bf07c6fddf.filesusr.com/ugd/cc94a4_ca0e0a378e5e40e58b69f19dcbba01c5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0987eada-69fb-40f1-83f0-9679e88f914e/58219470758.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97830d60-8d25-499b-8113-21552ba6a8f8/troy-bilt_storm_2410_2_stage_24_in._snow_blower.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://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF00 5508 bytes
SHA-256: 315db2dfc7fd737145e220fec79cb8ab274d7e296dc302fa599cebaa9392ccc3
font_01_sfnt_off0000f1b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B2 6796 bytes
SHA-256: b2cb7b512980a7de07468f524a9cd08366386aa94eed9f7e51005355b3ac6b31
font_02_sfnt_off000103e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E4 11312 bytes
SHA-256: 6d40030e8c58b5634d987595566133ab21092b608294cd4f56dd733402994a69

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