Malicious PDF — malware analysis report

Static analysis result for SHA-256 45cc000ed9a5f24c…

MALICIOUS

PDF

73.9 KB Created: 2021-02-17 16:40:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 40be7e5f11f366500b0f2e650ea1c9f2 SHA-1: de93536576433f5c04e0bafcd0f1ef0309c600eb SHA-256: 45cc000ed9a5f24cc86da48bd9fe1ab588edc173bbea56759188840ad6739b04
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan-like behavior. The document contains a large farm of external links, suggesting an attempt to redirect users to various potentially harmful websites or download pages. The presence of embedded URLs and the heuristic PDF_SEO_LINK_FARM firing strongly suggest a malicious intent to distribute or redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://druttle.ru/123?utm_term=justdial+interview+questions+and+answers+pdf+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415748/normal_602d091bb35be.pdfIn PDF document text
    • https://libepuve.weebly.com/uploads/1/3/1/4/131407284/lavozesiketatetof.pdfIn PDF document text
    • http://specrazreshenie.com/xixukujovatg7y0u.pdfIn PDF document text
    • http://discout.online/caged_2010_full_movie_freeqof2n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417426/normal_5fd2f7fe8d7ce.pdfIn PDF document text
    • https://xuzimelo.weebly.com/uploads/1/3/4/1/134132070/vejefujawetomid.pdfIn PDF document text
    • http://parhelifrl.space/solidworks_trial_software_free82lpd.pdfIn PDF document text
    • https://cdn.sqhk.co/lenufetimop/jajhehi/demolition_derby_multiplayer_mod_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tukorokibenej.epizy.com/automatic_call_recorder_pro_apk_mirror.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/dsssb_je_answer_key_sarkari_result.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/kupadorapadefufimazoxe.pdfIn PDF document text
    • http://luvurukakun.epizy.com/xifozefovifow.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/coursera_r_programming_week_2_assignment_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/21925846480.pdfIn PDF document text
    • http://deburukibovip.rf.gd/attack_on_titan_season_1_picture.pdfIn PDF document text
    • https://s3.amazonaws.com/zoxewudunigus/aqa_computer_science_a_level_book_answers.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_off0000e597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE597 5304 bytes
SHA-256: fcb7b61f233250524ca6bf5e8bd3c6ad1c7653432633d37815deb9efafa19b62
font_01_sfnt_off0000f7c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C3 10216 bytes
SHA-256: 28e2614f8a758db09147e186b05244802284656e648817d1341759e210493534

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