Malicious PDF — malware analysis report

Static analysis result for SHA-256 c56eceddda16cd81…

MALICIOUS

PDF

77.1 KB Created: 2021-02-09 23:33:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8e002277c814c9228345c103ebc842d7 SHA-1: 7e92f3237ef5bd6f31b3ec49478320d19bd00225 SHA-256: c56eceddda16cd810fdbf579c0a264165fc445cbc4f8f4e97f1373a9625b745e
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly-hosted PDFs, indicative of a link farm or SEO spam campaign. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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/aws?utm_term=free+esl+worksheets+for+advanced+students PDF link annotation
    • https://siwevamad.weebly.com/uploads/1/3/1/8/131871433/4150f4bdc5ee4e4.pdfIn PDF document text
    • http://meblik.su/ncl3_bond_angleyow47.pdfIn PDF document text
    • http://vsspb.ru/balanceamento_por_oxirreduo_exercicios_resolvidos4lvvq.pdfIn PDF document text
    • https://dopovubejaxow.weebly.com/uploads/1/3/4/0/134017692/pozajo.pdfIn PDF document text
    • https://vigoxanumevu.weebly.com/uploads/1/3/4/4/134466257/2200634.pdfIn PDF document text
    • https://wedarudojov.weebly.com/uploads/1/3/4/0/134012757/c420f.pdfIn PDF document text
    • https://cdn.sqhk.co/goluxewimabu/TRCOCXG/tiximupok.pdfIn PDF document text
    • https://bunojero.weebly.com/uploads/1/3/0/8/130874162/195125d2.pdfIn PDF document text
    • https://sefelitajirowa.weebly.com/uploads/1/3/0/9/130969992/selepawasisatig-jidaj-tekoparedorobet.pdfIn PDF document text
    • https://cdn.sqhk.co/fexejikexew/bhggjI7/wallpaper_iphone_ios_10.pdfIn PDF document text
    • https://cdn.sqhk.co/jobebakegip/dUiEhhK/road_rage_epic_shooting_florida.pdfIn PDF document text
    • http://fionainthefield.org/ielts_writing_ngoc_bachbkbvy.pdfIn PDF document text
    • https://saduzoxizujakef.weebly.com/uploads/1/3/1/0/131071125/xitunepup_witataxe.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/viwoxuz/jarotabe.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/blue_eyes_full_song_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/osmosis_and_diffusion_egg_lab_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/calculus_1_lecture_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/black_veil_brides_former_members.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/xusubuzutovekekolikovala.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/92269576630.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/answering_service_companies_usa.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_off0000e4ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4ED 5112 bytes
SHA-256: e424c7260526e29ff9b78166ec0119831fe74ddbd31616dc2d049d48e564ee05
font_01_sfnt_off0000f667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF667 10000 bytes
SHA-256: 771dd7ee4c40f26f7b4147d506ccaf8dc67271a56272596b17f216af729efba0
font_02_sfnt_off000118b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B6 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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