Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1ea194368c4d445…

MALICIOUS

PDF

87.7 KB Created: 2021-06-06 20:03:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: ede130de8a3c99b6128cd0ca11f21641 SHA-1: e4e520bbefe4a9658dca432232da3758c1aa35c3 SHA-256: d1ea194368c4d445a4f8f2e681f06c89f8344c8becf83b51f85f9882d1e11f12
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or spam campaign. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to manipulate search engine results or direct users to malicious content. The document body is heavily obfuscated, but the presence of numerous external links is a strong indicator of malicious intent.

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 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://nomylo.ru/pbw?utm_term=does+apple+watch+cellular+work+with+xfinity+mobile PDF link annotation
    • https://kafunonedejo.weebly.com/uploads/1/3/4/6/134662894/sesolasenuxab-sunebozemato-pixivatobis-nunixix.pdfIn PDF document text
    • https://vopesowe.weebly.com/uploads/1/3/4/6/134638419/liwagiti-sojefodeboxilap.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kolelulu.pbworks.com/w/file/fetch/144562800/kedakor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a74009b-3966-4389-9036-23091f260b2b/how_to_use_a_ritetemp_thermostat.pdfIn PDF document text
    • http://nusuwoxub.pbworks.com/f/amharic_bible_commentary_free_download_zondervan.pdfIn PDF document text
    • http://finebov.pbworks.com/w/file/fetch/144441015/xl830l_multimeter_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86fd34bd-b9aa-492b-b7f6-86da1ba800e5/2018_ford_explorer_sport_owners_manual.pdfIn PDF document text
    • http://kigemulu.pbworks.com/w/file/fetch/144694593/mutisexugajilalizowivixem.pdfIn PDF document text
    • http://mudowomuxexo.pbworks.com/f/descargar_dragon_ball_z_budokai_tenkaichi_3_para_ps3_pkg.pdfIn PDF document text
    • http://bilabegape.pbworks.com/f/david_griffin_ritual_magic_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41b87f4f-24a9-40a5-b2c6-25b62a6ad4cc/22943318364.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ef0864b-cb19-4fdf-9d71-9b5e0cc11857/todosu.pdfIn PDF document text
    • http://jitilabajeko.pbworks.com/f/carcassonne_amazonas_rules.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/718f120c-263a-4ebf-98d2-8e2569b1c320/24775833730.pdfIn PDF document text
    • http://sorawako.pbworks.com/w/file/fetch/144445662/goluvafesogowivitimup.pdfIn PDF document text
    • http://natutaliva.pbworks.com/f/17820974704.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfc3c7a1-be2a-4eb3-be4f-944a8dba8cdc/72685730823.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4364436d-eb5d-483b-8536-f0386f55dac1/the_uglies_book.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_off00010010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10010 5720 bytes
SHA-256: 5d90e67f4f946f0f1e92fd2b2da8efa6d22db4544f73e44f76020eddce5e9990
font_01_sfnt_off0001137c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1137C 11444 bytes
SHA-256: f43c42dd27e0d3acf04a861953cb220fe5cd95ef969ffc72a0553cd90193ec3e
font_02_sfnt_off00013aa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AA7 16060 bytes
SHA-256: 5b0d2701ab39d2f69c66d7d16c60d8db0b323aa0832947137e757b5401d27330