Malicious PDF — malware analysis report

Static analysis result for SHA-256 114f059ecc4f9fe0…

MALICIOUS

PDF

76.8 KB Created: 2021-03-25 01:33:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f22c8f88284b5a8ed6812093b5c3b384 SHA-1: 5951a1cdab6d951271734b74538c5dddcfd8c80b SHA-256: 114f059ecc4f9fe0a373b3ac726cf8d413a3f21235014aa3cdf2256e590f18e7
194 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 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://bologen.ru/award?keyword=ruhs+bsc+nursing+entrance+exam+syllabus+pdf PDF link annotation
    • http://redirunna.xyz/your_zone_loft_bed_assembly_instructions731hv.pdfIn PDF document text
    • http://usersdeviceprotectionservice.site/silisizaralusejp2jfr.pdfIn PDF document text
    • http://busurman.space/poxumadapijusazuwefijukog19wav.pdfIn PDF document text
    • http://segwaywheelchair.ru/703124194255utjb.pdfIn PDF document text
    • https://cdn.sqhk.co/jevipugirofi/dZijadl/ucc_ean_barcode_font.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/Cnjdbf2/international_marketing_notes.pdfIn PDF document text
    • https://sokuvefababadax.weebly.com/uploads/1/3/1/8/131856373/4399043.pdfIn PDF document text
    • https://xixekelubijaruj.weebly.com/uploads/1/3/5/3/135329585/e5ac25cda91653.pdfIn PDF document text
    • https://fekawuzode.weebly.com/uploads/1/3/5/9/135993312/luraxejejego.pdfIn PDF document text
    • http://straponartist.com/zopivenazenenuxejafuxidohs3pq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://44bb6ee8-a0fe-4f72-890f-0f0a2fec05cf.filesusr.com/ugd/b65acf_32b62e8592de41c48d4ffe5fb8b685d7.pdf?index=trueIn PDF document text
    • http://vuloroluget.rf.gd/atlas_shrugged_summary.pdfIn PDF document text
    • https://1ffb5d6c-d890-49e0-9b87-dc10fbfa49e2.filesusr.com/ugd/8bc2a6_7d021476fd0f443ead42c0c3148693cf.pdf?index=trueIn PDF document text
    • http://potimafekun.epizy.com/solid_converter_v9_full_crack.pdfIn PDF document text
    • http://vujiwexamofone.rf.gd/whats_a_spiritual_blessing.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_off0000eaa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA1 5888 bytes
SHA-256: c2a4925dbd8af35f2cedda183dece4a77d81930607ceb1cc513263de334069f0
font_01_sfnt_off0000fe93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE93 11100 bytes
SHA-256: a6e25830b03edc395da31bd4ff568a9e2f77be0987b7590f7890cc7b920093bf

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