Malicious PDF — malware analysis report

Static analysis result for SHA-256 c68d5d583fd3df83…

MALICIOUS

PDF

79.5 KB Created: 2021-06-14 13:23:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b47ddc9cbc9ff90d2298c8ac523f468 SHA-1: d50dfc775d35d2fa4399edf5a6b5b7e1d88a6546 SHA-256: c68d5d583fd3df83a887d16f1aad29fc2c56fc4f2617ef00be916b7808d6e70b
96 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. The document body, though heavily obfuscated, contains text related to 'Telugu ringtones' and application metadata, suggesting a lure. The presence of embedded URLs and the PDF structure strongly indicate an attempt to redirect users to malicious or ad-heavy sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 4

  • 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.
  • 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://laborke.ru/pbw?utm_term=best+bgm+ringtones+telugu
    • https://cdn-cms.f-static.net/uploads/4424400/normal_5fdbf55d77669.pdf
    • https://wesotapaxo.weebly.com/uploads/1/3/4/4/134488604/sojewebolo.pdf
    • https://dozasasakebo.weebly.com/uploads/1/3/1/1/131164234/bolapobedapomej-gudazogoret-sefevudijer.pdf
    • https://rotolakudezi.weebly.com/uploads/1/3/4/0/134041133/1a5d8.pdf
    • https://static.s123-cdn-static.com/uploads/4459059/normal_5ffaa10b1a555.pdf
    • https://cdn-cms.f-static.net/uploads/4412591/normal_6010f8ae137d8.pdf
    • https://xijadusulotogu.weebly.com/uploads/1/3/6/0/136089771/265597.pdf
    • https://gidujinogojavu.weebly.com/uploads/1/3/4/0/134096303/f1a50d8b4720.pdf
    • https://vudunige.weebly.com/uploads/1/3/5/9/135981242/rutebaravakerivewoma.pdf
    • https://latabiwot.weebly.com/uploads/1/3/4/6/134612911/5ec02c6a8abcc.pdf
    • https://bopuxokefira.weebly.com/uploads/1/3/5/3/135300507/4039566.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://balejuw.pbworks.com/f/32358185062.pdf
    • https://uploads.strikinglycdn.com/files/26dee72d-ebb7-427e-acc2-4785a0fa2d3a/sodastream_fizzi_one_touch_sparkling_water_maker_white_with_mini_cylinder.pdf
    • https://uploads.strikinglycdn.com/files/1a960bfc-35da-44f5-9810-3c8bd9a7abe5/6250719737.pdf
    • https://uploads.strikinglycdn.com/files/9fc806cd-2f38-4501-bd2c-27e7a78cd4f1/xanusonekalejonu.pdf
    • https://uploads.strikinglycdn.com/files/d2abf4f1-08b7-4ed6-a43f-255294e11410/all_organisms_in_an_ecosystem.pdf
    • http://kiletejude.pbworks.com/w/file/fetch/144651426/wenenebifunarekamusunab.pdf
    • http://zutaman.pbworks.com/f/sherlock_holmes_free.pdf
    • https://uploads.strikinglycdn.com/files/0f0d708e-1c8c-4ccc-9f86-837c9ba59a35/ritetemp_thermostat_programming.pdf
    • https://uploads.strikinglycdn.com/files/a3bafcac-b93d-4f6e-b9bc-7c1408d78383/8_parts_of_speech_definition_with_examples.pdf
    • https://uploads.strikinglycdn.com/files/3da5addf-6fb1-46a2-8c96-4a59d2289afe/malexunalerulazosum.pdf
    • http://mikabipi.pbworks.com/f/75000814716.pdf
    • https://uploads.strikinglycdn.com/files/4955f245-fb4b-4e2e-9c25-0a449bcc4aa5/research_proposal_on_accounting_and_finance.pdf
    • https://uploads.strikinglycdn.com/files/7c06d8cb-ccdf-4c49-a797-f0e671d17875/asrock_z87_pro3_cpu_support.pdf
    • https://uploads.strikinglycdn.com/files/2df6f867-5ed0-455d-9b65-9b6b1f42f166/how_to_adjust_ariens_snowblower_belts.pdf
    • http://lekuzax.pbworks.com/f/reading_inca_history.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcc4.bin
ee87b8e3b550c98dea0f9faf12e882427245c8b39758672299ae78071c23aa7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC4 4984 bytes
font_01_sfnt_off00010da7.bin
6d43137a843541ae10ba9d45ccfe11093fff50b9f4df46f398b7e697bacdf2e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA7 10060 bytes

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