Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d97b900c2d9f2f8…

MALICIOUS

PDF

77.7 KB Created: 2021-03-05 09:39:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 7572055530d2aa5782113ced58593526 SHA-1: bf60b391455d7e5bed50608a995529409b256601 SHA-256: 9d97b900c2d9f2f895818b80a30f5136bfa7a6aa3384d1d96483f3683a564da0
164 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are disguised as downloadable files or search results, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of numerous external URIs points to an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://seumenha.ru/wix?keyword=feed+us+3+hacked+unblocked PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490133/normal_6025ae3fb38a2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445736/normal_5ff19b0eab0ec.pdfIn PDF document text
    • https://cdn.sqhk.co/nazutupim/jc09QZp/the_factory_gadsden_birthday_party.pdfIn PDF document text
    • https://cdn.sqhk.co/gabisolovima/jP9L1gi/flashlight_song_pitch_perfect.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420238/normal_5fde2065c97fc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://63995da9-74be-4895-8497-a4fa53c9845d.filesusr.com/ugd/788c84_5bc1acfee9534a868387bfa946f51c81.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/43780424460.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/vcredist_x64._exe_2013_free.pdfIn PDF document text
    • https://cf4de027-7369-46c2-bf93-d69cabef2b5e.filesusr.com/ugd/868b90_4b356d3172914c92895a6fa9c8e6c8a0.pdf?index=trueIn PDF document text
    • https://f730d15c-1921-46d2-b6d4-288333e40990.filesusr.com/ugd/e2c223_1a0221ade55841e98d22dc87844f9ee0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bepukuba/swot_analysis_sample.pdfIn PDF document text
    • https://2d2b1dae-c014-4902-97e6-c3f1d56915cd.filesusr.com/ugd/70e5f7_41d6e5bf1eff4f53951cb3d898392813.pdf?index=trueIn PDF document text
    • https://7f793f8f-877f-420e-851b-8bae9ea62a4d.filesusr.com/ugd/78c764_be2990c37e8e483eabc2b1a28f9e3439.pdf?index=trueIn PDF document text
    • https://99442e0c-e188-470f-b1e9-a2082f9e7f28.filesusr.com/ugd/2274a7_f9d13fae22e94185905d74f296bf17db.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/wubokepatorufibire.pdfIn PDF document text
    • https://dbba0f06-1911-40f0-8c80-a2638c7f81cc.filesusr.com/ugd/b13fd1_23d6997d8a914d58814589e67dce5cae.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/can_netherland_dwarf_rabbits_live_inside.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_off0000f2a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A4 5252 bytes
SHA-256: b8fe8b44a9fcdd8777333463a7a87f59530cd72eb96de1776711cc49acb5b52d
font_01_sfnt_off00010480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10480 10928 bytes
SHA-256: e4fa4e5d947454701930fd199e142cdde209d8afec299e6a6cfc93e75763883f

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