Malicious PDF — malware analysis report

Static analysis result for SHA-256 99348ec2cd14e708…

MALICIOUS

PDF

76.8 KB Created: 2021-03-28 02:41:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9402bbec33dae7a4c3084d21578e836 SHA-1: e6079c6c00b9ab3dec4d9ef2323ebde1fa84cbd3 SHA-256: 99348ec2cd14e7084d2f127f4e9621ef675f44a772cac06f143a8dbf68930358
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, with the primary suspicious URL being 'https://pelibifir.ru/wix?keyword=smooth+er+analogy'. This behavior, combined with ClamAV detection as 'Pdf.Phishing.Trojan', strongly suggests a phishing or malware distribution campaign. The ML classifier also flagged this PDF with a high probability of being malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/wix?keyword=smooth+er+analogy
    • https://cdn.sqhk.co/dasekizob/jjgcege/berebuziwekojos.pdf
    • https://cdn.sqhk.co/bavomizobe/aGhgbgf/pifogijozuji.pdf
    • https://cdn.sqhk.co/sowuwinadapu/djDjgja/picsart_gold_apk_free_ios.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://11210a16-d5d1-4e17-93a3-27fbbb12f21b.filesusr.com/ugd/fb658e_4b35f389744c429dad3959df27d58edd.pdf?index=true
    • https://s3.amazonaws.com/bewibiwat/kojekanajadejutibeta.pdf
    • https://uploads.strikinglycdn.com/files/89bbf466-e557-4461-881b-ae665bad149c/pt111_millennium_g2_specs.pdf
    • https://87b84290-c0b3-4c73-97a1-3d59c64c3f69.filesusr.com/ugd/c638b7_a8f9ac3352f546fb8c2c683ebd9b62c3.pdf?index=true
    • https://s3.amazonaws.com/lazesej/free_printable_will_template.pdf
    • https://uploads.strikinglycdn.com/files/727066db-46a9-432d-8b9c-05c934add35e/how_to_write_a_short_biography_about_yourself_examples.pdf
    • https://uploads.strikinglycdn.com/files/6c030fb8-86bc-4c8c-b919-02036ab46977/diablo_iii_ps4_multiplayer_offline.pdf
    • https://76bf42c0-7447-45ed-8dd3-33f9786ae3ae.filesusr.com/ugd/ba2c19_c6652fd2742846ffb84c40d33de6adf4.pdf?index=true
    • https://uploads.strikinglycdn.com/files/698ff309-c601-4bfb-9df7-67521e5365e1/93722163276.pdf
    • https://s3.amazonaws.com/vavale/3d_animation_software_for_android.pdf
    • https://s3.amazonaws.com/megujobemegor/jidan.pdf
    • https://s3.amazonaws.com/zosevid/admin_job_interview_questions_and_answers.pdf
    • https://uploads.strikinglycdn.com/files/4ded0e93-9d91-4b83-b865-c52aa9b21633/maxosusanovag.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_off0000f216.bin
8a005830dcc0fe69ed22642bfd65d3095b9c01e5a3411f3f501288afccb6d715		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF216 5124 bytes
font_01_sfnt_off0001035a.bin
7bee9f69d7501a9eb8de39597c35a9e027618cbe39973560465cfcc9cb8396d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1035A 10388 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.