Malicious PDF — malware analysis report

Static analysis result for SHA-256 01c778e06b4834aa…

MALICIOUS

PDF

77.0 KB Created: 2021-02-15 22:15:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 5ce23c22a61f0036d0102ced8adb8c91 SHA-1: 7526ede29b5b3666e39d50ea852c408d710d03c3 SHA-256: 01c778e06b4834aa5bef87e17f4e6d66400718987b3d2fbed2745341b6fd0b1e
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting, indicative of a link farm or phishing operation. The primary URL, 'https://jottigo.ru/strik?utm_term=used+lexus+es+350+for+sale+by+owner+near+me', is presented as a search result lure. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest malicious intent, likely related to phishing or malware distribution.

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.
  • 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://jottigo.ru/strik?utm_term=used+lexus+es+350+for+sale+by+owner+near+me PDF link annotation
    • http://pupijepu.22web.org/cavite_state_university_indang_online_application_form.pdfIn PDF document text
    • https://cdn.sqhk.co/fetadupozo/ejiiajj/28652182435.pdfIn PDF document text
    • http://finovadi.iblogger.org/apexcharts_datalabels_formatter.pdfIn PDF document text
    • https://cdn.sqhk.co/jutafegobexe/LqMyBhj/spirit_airlines_phone_number_855.pdfIn PDF document text
    • https://cdn.sqhk.co/puzukebejas/fiagdjc/multicraft_skin_download_free.pdfIn PDF document text
    • https://cdn.sqhk.co/timugulirebu/shdi3we/81651442522.pdfIn PDF document text
    • https://zulazuxalumino.weebly.com/uploads/1/3/1/6/131606396/100295418c.pdfIn PDF document text
    • https://cdn.sqhk.co/niminililez/gihbidn/escape_plan_3_imdb.pdfIn PDF document text
    • https://cdn.sqhk.co/wesebewoweva/H5wIsjf/45272434992.pdfIn PDF document text
    • https://daxexamuve.weebly.com/uploads/1/3/4/4/134446800/jaritexibobad-vojinexosogel-tamomopatit.pdfIn PDF document text
    • https://xebuzoxovekig.weebly.com/uploads/1/3/4/0/134018553/fikowipifibuji.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wetedezowob.rf.gd/programa_festival_internacional_cervantino_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/atualizao_android_8._0_moto_z2_play.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/chinese_consonants_and_vowels.pdfIn PDF document text
    • http://pudubekij.epizy.com/15497421085.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/homeostasis_definicion.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_off0000ebcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCD 5876 bytes
SHA-256: ea37e59ace6c46fa5d248ff09585c321150ecb0f504efd4063c682f90684b844
font_01_sfnt_off0000ffd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD5 11836 bytes
SHA-256: cce02bfec6010b65e26f137019479d8349f12f3916a95831dfc1acd220c8028c

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