Malicious PDF — malware analysis report

Static analysis result for SHA-256 1490b7d8edb4dcb6…

MALICIOUS

PDF

86.5 KB Created: 2021-03-22 11:19:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5db6208dcc282c2514724d0c805d308d SHA-1: 94443a04e633ca276e601c26c4c296ff316f4f1a SHA-256: 1490b7d8edb4dcb62ec56d0b2731d649c598012c4919feaf8ebd198fa7892dd9
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 0.9983

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://lozipotod.ru/wix?keyword=windows+10+apk+for+pc PDF link annotation
    • http://tuzojexis.mypressonline.com/89269469631.pdfIn PDF document text
    • http://zitugaxusi.mygamesonline.org/manual_de_alimentao_saudvel.pdfIn PDF document text
    • https://penizamuravepu.weebly.com/uploads/1/3/5/9/135976181/844114.pdfIn PDF document text
    • https://mexobuvuxe.weebly.com/uploads/1/3/4/3/134369937/kovov_nuregedarozuxan_xelitamimegesu.pdfIn PDF document text
    • https://cdn.sqhk.co/bofagenined/hcjhcUB/modasifutun.pdfIn PDF document text
    • http://ponupofo.iblogger.org/how_to_draw_an_anatomical_heart_step_by_step.pdfIn PDF document text
    • https://cdn.sqhk.co/toxotunem/0hhcjjo/snappers_bar_and_grill_mechanicsburg.pdfIn PDF document text
    • https://cdn.sqhk.co/nizufalagef/bgjekii/60124657313.pdfIn PDF document text
    • https://biwakegexenulu.weebly.com/uploads/1/3/4/4/134437141/4058515.pdfIn PDF document text
    • http://xijulefabogi.getenjoyment.net/jefegebajukifilij.pdfIn PDF document text
    • https://teriwogawuf.weebly.com/uploads/1/3/2/8/132815342/e4ed66e83f.pdfIn PDF document text
    • http://gudibetujem.iblogger.org/how_does_google_sync_work.pdfIn PDF document text
    • https://jonexizuli.weebly.com/uploads/1/3/4/2/134235370/151e4fb74ec581.pdfIn PDF document text
    • https://cdn.sqhk.co/daxerarugak/hgQIjjh/51043023403.pdfIn PDF document text
    • http://zomolejefej.mywebcommunity.org/96748113661.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/pabele.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/xanathar_s_guide_to_everything_cleric_spells.pdfIn PDF document text
    • http://nagasupewi.rf.gd/dexalepazaxusawa.pdfIn PDF document text
    • http://lutubipejor.rf.gd/kidney_failure_symptoms_in_tamil.pdfIn PDF document text
    • http://vonubopoz.rf.gd/google_documents_invoice_template.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/lakelaromozugefibeleren.pdfIn PDF document text
    • http://rorujuzolu.epizy.com/el_principe_maquiavelo_resumen_por_capitulos.pdfIn PDF document text
    • http://luwekexopevom.rf.gd/double_sided_tent_card_template_5305.pdfIn PDF document text
    • https://s3.amazonaws.com/patilawasu/96270431660.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED11 6440 bytes
SHA-256: a606a6dede3b99472d2ac97761204782646b5f75106b48d1abccbe9a99ca9a4c
font_01_sfnt_off0000fd05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD05 5480 bytes
SHA-256: 25703ad613c8209332cb244098e9b06447e59ce1702bd550600f3d0c24c483eb
font_02_sfnt_off00010fd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD4 1936 bytes
SHA-256: cf50d13c5c21d2e34fba0d9dd21119d4839fc35fdaebfe62cbacf51850cc328d
font_03_sfnt_off00011913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11913 21420 bytes
SHA-256: 5ea3f445a8be49be251bba16f7747ca383924361bc903d9c3326faf88c6ef478