Malicious PDF — malware analysis report

Static analysis result for SHA-256 2617b13dd4a017fb…

MALICIOUS

PDF

81.6 KB Created: 2021-03-17 09:22:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ca97e2e867c6d67881571a02f6d2e86f SHA-1: 9d4e60e85a04688f992437dbc7cc545d5caf6cfe SHA-256: 2617b13dd4a017fbd2dca1ab202d3f6c5c7f2116dff5ef16f698d5673bd4da4b
134 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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 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.
  • 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://baarspo.ru/award?keyword=twinkle+twinkle+little+star+piano+pdf PDF link annotation
    • https://cdn.sqhk.co/xobupuwulawe/eieLqhh/backslash_on_android_keyboard.pdfIn PDF document text
    • https://cdn.sqhk.co/vifejoneses/jcugiEg/51006755628.pdfIn PDF document text
    • https://laropavo.weebly.com/uploads/1/3/4/5/134585926/vukixofozujopisapuv.pdfIn PDF document text
    • https://jonexizuli.weebly.com/uploads/1/3/4/2/134235370/7e79cb.pdfIn PDF document text
    • https://jefanumu.weebly.com/uploads/1/3/4/8/134889008/0c27f2b27b1677d.pdfIn PDF document text
    • https://pufukowog.weebly.com/uploads/1/3/4/5/134583281/wolodabatogevig_mopavew_joxen_movow.pdfIn PDF document text
    • https://cdn.sqhk.co/soziwariru/qHIlgcV/moxipoduzuvo.pdfIn PDF document text
    • https://fiferogupinuwa.weebly.com/uploads/1/3/5/3/135306016/lirivix-tibawiwuj-jozij-turobimisizojal.pdfIn PDF document text
    • https://cdn.sqhk.co/rusefijow/hiFqSgi/had_a_bad_day_lyrics_fuel.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/rutufokedizon/84938209155.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/57650215419.pdfIn PDF document text
    • https://s3.amazonaws.com/befafuni/79084026595.pdfIn PDF document text
    • http://wijuromosumeko.rf.gd/sisezaz.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/nakezikexod.pdfIn PDF document text
    • http://mirokuf.rf.gd/bihar_police_constable_bharti_2019_online_form.pdfIn PDF document text
    • http://bitujiduruv.myartsonline.com/abiotic_synthesis_of_organic_monomers_and_polymers.pdfIn PDF document text
    • http://zujakogi.onlinewebshop.net/arbitration_and_conciliation_act_amendment_2020.pdfIn PDF document text
    • https://1eb42bdc-3da6-4b32-b75f-4382f1721f8e.filesusr.com/ugd/35474d_6ffc3f2f047c441ca50fc4dee9f71a97.pdf?index=trueIn PDF document text
    • https://d5bea983-5bca-41ba-aae6-6b688785cc77.filesusr.com/ugd/9ec29b_8396c609c2c24e28b3fa69fc74a9e0cd.pdf?index=trueIn PDF document text
    • https://1e35b969-1f99-48dc-8aa8-d0fb9638bdc8.filesusr.com/ugd/970baa_c763ed12532444138869765d7e549746.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EF 5140 bytes
SHA-256: 1181d29e1cba2da8f847f9a11e8a2bbddde996db58a088886232835051d3b655
font_01_sfnt_off0000fb91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB91 11176 bytes
SHA-256: b3cca2a85c0b4ad1556a6ea8580bbf0035607cfbc542b60a34c82484bf1f6757
font_02_sfnt_off000121c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121C1 16164 bytes
SHA-256: c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e

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