Malicious PDF — malware analysis report

Static analysis result for SHA-256 1844f3764fbd57bb…

MALICIOUS

PDF

75.6 KB Created: 2021-03-18 05:15:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8014e2f871d33c95c7174cbaf4f90aac SHA-1: b1bc9d623096bb72c527da6af9d8ef5f4fed9153 SHA-256: 1844f3764fbd57bbfff7c6e4de4e3f23fd4d289d58ba678cec7ea2a38a3328d1
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9997

Heuristics 5

  • 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.
  • 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://mezovuduw.ru/123?utm_term=lady+chatterley%2527+s+lover+2015+full+movie PDF link annotation
    • https://piwevowukitibe.weebly.com/uploads/1/3/1/4/131454699/5182151.pdfIn PDF document text
    • https://cdn.sqhk.co/vozevadijut/hjHiaOl/fortnite_gun_sounds_download.pdfIn PDF document text
    • http://tukiviretek.iblogger.org/cardiopathie_cyanogne.pdfIn PDF document text
    • https://cdn.sqhk.co/rodoruwuwab/MSjcKhd/jotaro_s_theme_piano_sheet_music.pdfIn PDF document text
    • https://budemarapi.weebly.com/uploads/1/3/1/3/131381681/parusozipuse-jazowil-mevuvutasofo.pdfIn PDF document text
    • https://cdn.sqhk.co/livefivepa/hejgNge/blundstone_waterproof_boots_mens.pdfIn PDF document text
    • http://lufawobakisi.22web.org/adobe_photoshop_tutorials.pdfIn PDF document text
    • https://sotugenedoximo.weebly.com/uploads/1/3/4/0/134040923/7811774.pdfIn PDF document text
    • https://gawufuxawejax.weebly.com/uploads/1/3/1/8/131855981/kobexozuruvoj_neguvuguziza_nubititevedejik_fejoripeb.pdfIn PDF document text
    • https://soguleta.weebly.com/uploads/1/3/4/3/134305846/f17f87e136e80.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/af7270c5-4aa7-4b02-af76-48aa114f2f42/how_to_operate_ge_convection_oven.pdfIn PDF document text
    • http://gesulomesazisaj.epizy.com/field_hockey_glove_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/16040949537.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/lowewaxenuwekesi.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/mupuxofaxujufituwesi.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/72918220561.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93f27cdf-5c29-423a-9bbd-24c07c1ca661/rank_the_states_on_the_basis_of_the_pressure_of_the_gas_sample_at_each_state.pdfIn PDF document text
    • http://vefapiba.epizy.com/2622332512.pdfIn PDF document text
    • http://ximuruguj.epizy.com/44719844799.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/63664347541.pdfIn PDF document text
    • http://zabirozoxut.epizy.com/goxuxigedasuvuk.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_off0000ddde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDE 5848 bytes
SHA-256: 422d55dd4288500f2bb4e7c06035648cd9ca423e9b9d4892a8c5ebca05ae2193
font_01_sfnt_off0000f1c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C5 14672 bytes
SHA-256: afba6577c4c4401800ef9f3ba8b2a326bdf4b9c4578f57d43fa9f6a42043f57d

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