Malicious PDF — malware analysis report

Static analysis result for SHA-256 e95a5a2319682777…

MALICIOUS

PDF

86.1 KB Created: 2021-05-07 14:16:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e17463c92fad3063078db749f6181858 SHA-1: 5aee917d88e1711e0081384f7d57c498f085796e SHA-256: e95a5a23196827776ec4b75070b4bae8a1caff8a68b2326b265843fb81b6893d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://midufefew.ru/strik?utm_term=how+to+change+hp+ink+cartridge+952 PDF link annotation
    • https://cdn.sqhk.co/ximegawaso/haPYu0A/pifetomugunabeje.pdfIn PDF document text
    • https://cdn.sqhk.co/sawowudin/iehhihe/faa_weather_book.pdfIn PDF document text
    • http://gabofovopajojo.iblogger.org/40032779790.pdfIn PDF document text
    • https://cdn.sqhk.co/goxepijikun/hbWHFhe/cg_hd_video_song.pdfIn PDF document text
    • https://cdn.sqhk.co/gavezexu/gdji0CB/vevitu.pdfIn PDF document text
    • https://cdn.sqhk.co/joduragenep/jftaiav/vedusapanu.pdfIn PDF document text
    • http://sesiruwasos.22web.org/xugegatewozij.pdfIn PDF document text
    • http://fringigejy.site/toro_power_clear_721_e_review8a75w.pdfIn PDF document text
    • https://cdn.sqhk.co/gederanew/h0pq5hc/mower_blade_hits_deck.pdfIn PDF document text
    • https://cdn.sqhk.co/sujutowupolu/gnjgbia/zombie_hq_apkhome.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/hbibhgc/87528995614.pdfIn PDF document text
    • http://copyright-help-report.com/318498356191lp81.pdfIn PDF document text
    • https://cdn.sqhk.co/talidapato/haJjoif/harris_j_age.pdfIn PDF document text
    • https://cdn.sqhk.co/sarunasol/ehiRja1/tv_series_quiz_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/kelanadu/6vWCXio/sawoka.pdfIn PDF document text
    • https://cdn.sqhk.co/morexemodoju/JorQidQ/dropshipping_guide.pdfIn PDF document text
    • http://pesuloduf.medianewsonline.com/magisazixuvagupoper.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zewadomi.myartsonline.com/knbs_census_2020.pdfIn PDF document text
    • http://fufudaloxola.onlinewebshop.net/reboso.pdfIn PDF document text
    • http://fuvarijes.atwebpages.com/elchuri_ayurvedic_books_in_telugu.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
    • 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_off0000fb5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5E 5656 bytes
SHA-256: 4e3064159c38dfa10bc7b36a01a2823fd16dadc2cf293ae761ae6e9273210b95
font_01_sfnt_off00010eb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB6 10964 bytes
SHA-256: 8db18c9e27039d89d93e68ca0e325d23415cf47741b489ce1f1bc63d2c47e717
font_02_sfnt_off00013429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13429 16540 bytes
SHA-256: d7606f184026197e851e58ddac8270ac14d59dbe05ebac82291c499296e636a9

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