Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f41ee1f19cfa112…

MALICIOUS

PDF

68.3 KB Created: 2021-02-21 00:50:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4acf2adc2639bd341be67d2fd2680381 SHA-1: 5240be871cf0254f5576a459ec08c550c505ec42 SHA-256: 2f41ee1f19cfa1126107d045ed0a8c8aa2a26a73f58415b1e10d7e157e396de7
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of numerous embedded URLs suggest the document is designed to redirect users to potentially harmful websites, likely for phishing or malware distribution. The document body contains garbled text, but the presence of URLs like 'https://jottigo.ru/wix?keyword=tempur+pedic+tp8000+manual' and 'http://dubesitobu.22web.org/ed_rosenthal_seeds.pdf' strongly supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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 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/wix?keyword=tempur+pedic+tp8000+manual PDF link annotation
    • http://dubesitobu.22web.org/ed_rosenthal_seeds.pdfIn PDF document text
    • https://zobagitolofoxaz.weebly.com/uploads/1/3/0/7/130739917/rulevu.pdfIn PDF document text
    • http://vpntop.info/john_deere_gx345_price_listnaas1.pdfIn PDF document text
    • http://devazabekodum.iblogger.org/good_food_guide_hanoi.pdfIn PDF document text
    • https://dofafurubes.weebly.com/uploads/1/3/4/7/134762343/mivurajo.pdfIn PDF document text
    • http://wagajij.22web.org/apache_rpm_for_centos_7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/61113594520.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/easy_monthly_budget_template_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/nefunupu/aarakshan_movie_song_ming.pdfIn PDF document text
    • http://wepuwuzuvam.epizy.com/nylon_braided_hose_pipe_specification.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_off0000ce1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE1D 5324 bytes
SHA-256: cf874ee9285fb115c204aaddb535e4085d9f0b2853c33e8c865801f994d937af
font_01_sfnt_off0000e01e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE01E 10824 bytes
SHA-256: 3f8c144ca5dad7611aac4f08a33cf825a3b23e1c2ee105d2f50f790a60c2234d

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