Malicious PDF — malware analysis report

Static analysis result for SHA-256 02596b5e8c0279c3…

MALICIOUS

PDF

75.7 KB Created: 2021-04-24 08:15:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: aaa26643902b6650ede81798347c2456 SHA-1: 22d6560a6498e935ec2ff9b6f08ed605fde6da44 SHA-256: 02596b5e8c0279c379c2ddbe51350c585ecbbf5afd39a97306eebc39ac155558
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The presence of a URL with a 'utm_term' parameter further supports a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/strik?utm_term=que+pasa+si+tienes+una+linea+negra+en+la+u%25C3%25B1a PDF link annotation
    • https://cdn.sqhk.co/fowifabibu/d2mzabj/47648991063.pdfIn PDF document text
    • https://kevititexozasen.weebly.com/uploads/1/3/2/7/132712545/ketigubowobes_batizuwu.pdfIn PDF document text
    • https://xonatusapu.weebly.com/uploads/1/3/5/3/135391421/kudajorinogegab.pdfIn PDF document text
    • https://cdn.sqhk.co/dejuxafe/gjijbTw/1343374821.pdfIn PDF document text
    • https://cdn.sqhk.co/bivuwusim/hiiqT0G/xafugazakufoliva.pdfIn PDF document text
    • https://cdn.sqhk.co/guzowozuk/gf0hgii/pac_man_championship_edition_2_ps4_review.pdfIn PDF document text
    • https://nafugawiwira.weebly.com/uploads/1/3/1/4/131438392/6485799.pdfIn PDF document text
    • http://eurosett.net/67467519575joeqt.pdfIn PDF document text
    • https://cdn.sqhk.co/kevuviwa/cghjj5K/capacitor_in_ac_circuit.pdfIn PDF document text
    • http://filemarker.store/zemosolasenatibifiratexupt0zsz.pdfIn PDF document text
    • http://trelon.fun/the_power_of_positive_thinking_book_review_pptxkmr9.pdfIn PDF document text
    • http://malespw.xyz/xosiwigiwutasvlu07.pdfIn PDF document text
    • http://amorexpo.com/17085900963a3o0z.pdfIn PDF document text
    • http://livecopyrightverification.com/samsung_whisper_mini_split_manualiulqs.pdfIn PDF document text
    • http://faceskinagainbeauty.xyz/37592113165pvmxy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xenamijexutagus.epizy.com/twilight_saga_breaking_dawn_part_1_music_list.pdfIn PDF document text
    • http://marobow.epizy.com/betusile_mcinga_song_vuso_wakho.pdfIn PDF document text
    • http://fovenipeder.rf.gd/bsc_1st_year_chemistry_notes.pdfIn PDF document text
    • http://vekoxoke.epizy.com/atul_purohit_garba_mp4.pdfIn PDF document text
    • http://wawazoja.rf.gd/38486818110.pdfIn PDF document text
    • http://medipebep.rf.gd/59569561246.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_off0000e536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE536 5260 bytes
SHA-256: e0bb373bf161e88e8dfcd109825e58126df20bb5b764c82708b952398265a81d
font_01_sfnt_off0000f6e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E3 12604 bytes
SHA-256: c07e6a1fe704d0c930dfdffc0596ef48b6874dcbc046260dba320791bdd47127

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