Malicious PDF — malware analysis report

Static analysis result for SHA-256 698a45a12157a8f1…

MALICIOUS

PDF

89.1 KB Created: 2021-03-14 10:53:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 77bc128010594cea68dd396d0efe5a05 SHA-1: 5b10f538a6e9a664695b76bf084826316757f6d2 SHA-256: 698a45a12157a8f18a3357b0c6556d5bc31b7e5260d63c1604efc964ac678d44
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, suggesting a link farm or SEO spam operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and external links are indicative of malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

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.
  • 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://bologen.ru/wix?keyword=ph+words+phonics+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446649/normal_5fd9c9c9386e0.pdfIn PDF document text
    • http://helplnstagramcontact6088758.com/mozilla_firefox_49.0_2_download16538.pdfIn PDF document text
    • https://debugifepini.weebly.com/uploads/1/3/1/0/131070476/nozosuv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382420/normal_5ff2c383e34e3.pdfIn PDF document text
    • http://draiwenstore.online/rixufidifezopubolivigwodgw.pdfIn PDF document text
    • http://zemegulobeka.iblogger.org/fighter_subclasses_5e_unearthed_arcana.pdfIn PDF document text
    • http://spain50off.info/delulaxmcto.pdfIn PDF document text
    • http://niwapona.iblogger.org/36208177364.pdfIn PDF document text
    • http://cheeronthemove.store/what_is_the_book_son_about3ym1p.pdfIn PDF document text
    • https://bobefadapuxat.weebly.com/uploads/1/3/4/8/134858353/3070092.pdfIn PDF document text
    • https://jimivisimobud.weebly.com/uploads/1/3/4/9/134901817/9124252.pdfIn PDF document text
    • https://tubufuximenijo.weebly.com/uploads/1/3/5/3/135304690/wusokot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376354/normal_60219d6b43932.pdfIn PDF document text
    • https://nojijakifon.weebly.com/uploads/1/3/4/0/134012839/rababewom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421939/normal_6033c031f204d.pdfIn PDF document text
    • http://openchambre.xyz/yamaha_yas-203_subwoofer_pairingjwb9k.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ed0f7819-48b4-4c0d-9119-93de03d81b9c.filesusr.com/ugd/e481ce_2cfefeed11ed4e389c7d219c56b1ce1a.pdf?index=trueIn PDF document text
    • https://559ef5b4-38f4-491c-95f5-a6f57f0534fb.filesusr.com/ugd/1b862a_8bb29cade8f74bc5b63c4532ddfeee2d.pdf?index=trueIn PDF document text
    • https://29aa9d28-cc9d-45fc-8d86-3718b5881c84.filesusr.com/ugd/74c34a_2c3036a37b974d29aaed6660959695f0.pdf?index=trueIn PDF document text
    • http://gibapomidumitar.rf.gd/26748845919.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/effingham_performance_center_seating_capacity.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/what_is_the_song_rainy_days_and_mondays_about.pdfIn PDF document text
    • http://donolipapaxe.rf.gd/apprendre_italien_gratuit.pdfIn PDF document text
    • https://af1bea64-f5cd-41c2-a7c1-97f21c1aa057.filesusr.com/ugd/592671_64757eb9ea8f4c44be57bd1f066b1500.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lulelepese/selenium_chrome_headless_file.pdfIn PDF document text
    • http://demiwadipojaz.epizy.com/68820831272.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FF 6744 bytes
SHA-256: b29f9350a720d2da9dc50567d08c4a82684db1fcb28a47e3a5788345b392d808
font_01_sfnt_off000106e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E4 5076 bytes
SHA-256: ee00ef0c225befeb8b5b1fb5518fcff84ba82727b77c04368430daaed956ad7f
font_02_sfnt_off00011835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11835 11376 bytes
SHA-256: 1e864f8987ea01057a320d75c119f585d8c03d1fdca687e544fe3ae1acd9234e
font_03_sfnt_off00013f3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F3F 16148 bytes
SHA-256: dbe1f6873dfbc63a557840fa26764ed1e24daf10180a919a5f50e881975b6f06