Malicious PDF — malware analysis report

Static analysis result for SHA-256 118fbb9df76c9631…

MALICIOUS

PDF

82.0 KB Created: 2021-03-08 16:58:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 277f33517d253d61a47bb3b3bce8a889 SHA-1: 40e449d2d10aa3b1f01b3e3479fa3b5b4288cd56 SHA-256: 118fbb9df76c96311150b4c87a58ed97afa37df0e602848a5f632eceaaa09dd0
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 services, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or hosting malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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.
  • 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://leonvi.ru/wix?keyword=dna+rna+and+protein+synthesis+worksheet+chapter+6-9 PDF link annotation
    • https://vipomumukewa.weebly.com/uploads/1/3/0/8/130813786/1ecaad8639147f.pdfIn PDF document text
    • https://tafopolen.weebly.com/uploads/1/3/4/3/134396822/5aba2785906c1d4.pdfIn PDF document text
    • http://luziniwanemek.sportsontheweb.net/excellent_gif_mr_burns.pdfIn PDF document text
    • https://tedamitaza.weebly.com/uploads/1/3/0/7/130740371/c0ac5bcf2d.pdfIn PDF document text
    • https://lomizagufefeg.weebly.com/uploads/1/3/4/0/134096038/lizonazawedikujuwiz.pdfIn PDF document text
    • http://ladyso.ru/2012_vw_passat_transmission_fluid_checkkhk8z.pdfIn PDF document text
    • https://relazubaw.weebly.com/uploads/1/3/5/3/135315829/rovurijubef_reruge.pdfIn PDF document text
    • http://bodyita.space/syllogisms_deductive_reasoning_answers1b1ug.pdfIn PDF document text
    • http://getcreditcheck.info/zunasewolegv9yca.pdfIn PDF document text
    • http://domainlimax.xyz/2020_yfz450_reviewx7hyu.pdfIn PDF document text
    • http://womenita.fun/pumipimasiniripotegebcqab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xamibudasagas/bubble_shooter_mod_apk_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/016df6ca-bde2-4e1b-996c-84684df685d3/romeo_and_juliet_1996_full_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32de4296-de86-456a-87d0-f84a0317785d/98692435834.pdfIn PDF document text
    • http://kosezofejesuxef.atwebpages.com/9171855292.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e705e001-b6e9-42a0-8f38-4c7a40892bd4/pod_xt_live_edit_software.pdfIn PDF document text
    • http://patudesaruvob.atwebpages.com/48623528158.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95bd0727-234b-47ef-9b73-4b26914da5f0/cub_cadet_lt1050_troubleshooting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9a1a1af-eeae-44cc-8480-654039c709c6/what_does_the_bible_say_about_bad_news.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/lizomufol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a03616d8-11ef-47d3-aac9-9c1bfbdf0f90/similar_figures_worksheet_8th_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30b83539-d1f6-481e-8d17-b281bdb153bb/5550374616.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cd28dd9-ab69-4206-834a-dde2483b8964/sanozolusogu.pdfIn PDF document text
    • http://xejobutek.onlinewebshop.net/guwosalemukulatotivijaf.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF647 5516 bytes
SHA-256: d402aff41d324df90b76222a43c29b3d04cba920990d0a530fcebaa2bc158830
font_01_sfnt_off0001091a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1091A 10092 bytes
SHA-256: dfaa20f5f8f6ee55c2679647b447a899a8ea08db90ab84debedbcaf93378d96a
font_02_sfnt_off00012ba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BA0 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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