Malicious PDF — malware analysis report

Static analysis result for SHA-256 83ccf384c2eabdab…

MALICIOUS

PDF

94.3 KB Created: 2021-04-05 01:21:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 50b7d62c8d2567fe33dc9485a49f3ca6 SHA-1: 1df1ad9114df5436dfaa1aabe0648c201bd38466 SHA-256: 83ccf384c2eabdab5ad83d016b73b4b0b95d1a8a5191611f065f22c5545b696c
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 0.9998

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://soxebez.ru/wix?keyword=bose+wireless+speaker+manual PDF link annotation
    • http://lafilubepojev.scienceontheweb.net/va_alive_and_well_statement.pdfIn PDF document text
    • http://gikodarekegov.mywebcommunity.org/an_astrologer_s_day_long_questions_and_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/gitaligido/7jfhfih/business_card_scanning_phone.pdfIn PDF document text
    • https://cdn.sqhk.co/retesixabe/ibjazie/rusk_deep_shine_shampoo.pdfIn PDF document text
    • https://cdn.sqhk.co/dagozuwemep/jbijght/41761214320.pdfIn PDF document text
    • http://fagumawegoleleb.mypressonline.com/gopro_hero_4_silver_4k_30fps.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ebc1add8-0b9d-418e-9e4a-1e287827e933.filesusr.com/ugd/ab63e3_5a2b1ff125a54d1a9b69362dfcf6d1a6.pdf?index=trueIn PDF document text
    • http://soneloratugop.epizy.com/teaching_reading_approaches.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e01dd85-4d78-4270-b639-9f7fcb29cdf4/basic_drawing_classes_for_adults.pdfIn PDF document text
    • https://26bfc7ce-baa4-43a1-9280-72312523cbd3.filesusr.com/ugd/5af86b_ba20a1d24c8b4af4ad83b315e8b15181.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc423e0a-b07f-4b8a-8ca6-2d402918d8d2/43160807175.pdfIn PDF document text
    • http://titomozuluvexov.epizy.com/nudanewarifunapadu.pdfIn PDF document text
    • https://22e365c6-0853-42e1-82f8-83473bf9c0bf.filesusr.com/ugd/217d68_51c95bd45f43472daab7da4810fbfca2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/507e0be7-d296-40bf-9fd6-cd127344e5cb/baofeng_uv-5r_iii_review.pdfIn PDF document text
    • http://bixodog.rf.gd/bapibixaja.pdfIn PDF document text
    • https://dfa52777-3edb-460f-9b14-ca5101cd4ecc.filesusr.com/ugd/5360f8_683323552a564fcaad53db74becc60a9.pdf?index=trueIn PDF document text
    • https://f608bf75-187c-4b28-9621-af925c05c2b6.filesusr.com/ugd/05e3ad_60caeeee5a464c3985154df1380b57c2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca23a7ac-b99d-44a8-8164-ab07d1e47aad/words_to_describe_deep_poetry.pdfIn PDF document text
    • http://gixejemazob.myartsonline.com/electrocardiograma_libros.pdfIn PDF document text
    • http://timagugovoxo.onlinewebshop.net/alleluia_canon_mozart.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_off0001375c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1375C 5172 bytes
SHA-256: 4904f4302f16d39eb91e8bb133c8f1f789956f047568a0a9174be23f4b18a4c9
font_01_sfnt_off000148ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148EF 10128 bytes
SHA-256: 9012d53f439420097b7a591bea604b815b9da894bc4367a57fc8f9de33359cee

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