Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed272cd6452da287…

MALICIOUS

PDF

72.6 KB Created: 2021-02-22 09:23:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: cd237ba7f903dba03e0ff32569424c8e SHA-1: 4e74ef66ae064204aa234a343766ca306c8c4564 SHA-256: ed272cd6452da2872a39356c0d3e4926ddf1034851babab83a8c810aa494046e
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are structured as SEO-optimized links to other PDF files. One of the primary URLs, 'https://jacksth.ru/wix?keyword=defending+jacob+pdf+online', suggests a lure to trick users into visiting a malicious site. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

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://jacksth.ru/wix?keyword=defending+jacob+pdf+online PDF link annotation
    • https://cdn.sqhk.co/tememagitapo/YjgbKgg/infinity_stones_meaning.pdfIn PDF document text
    • https://xulewanexu.weebly.com/uploads/1/3/4/1/134108589/0925627.pdfIn PDF document text
    • https://cdn.sqhk.co/vatuliwa/geidjbq/international_dna_day_in_us.pdfIn PDF document text
    • https://tunedewujanan.weebly.com/uploads/1/3/5/3/135345761/814919.pdfIn PDF document text
    • https://lidovoji.weebly.com/uploads/1/3/4/3/134313359/58ca7e.pdfIn PDF document text
    • https://rodironamo.weebly.com/uploads/1/3/5/3/135347674/wetezofusok_kumefubelasete.pdfIn PDF document text
    • https://givurili.weebly.com/uploads/1/3/4/6/134605008/pomafemazolava-guxopuwem-sezos-lijubutugokumi.pdfIn PDF document text
    • https://weziriditovi.weebly.com/uploads/1/3/4/1/134108838/wiriloniju-gifarimidamop-giken.pdfIn PDF document text
    • https://cdn.sqhk.co/manaruparil/fChcLb1/jusopem.pdfIn PDF document text
    • https://retedavaliloxi.weebly.com/uploads/1/3/5/3/135393755/tajikosesa-matarozag.pdfIn PDF document text
    • https://cdn.sqhk.co/vawapisoxe/DibzheV/cake_design_ideas_for_baby_boy.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
    • http://zodumokosijupe.epizy.com/47799156615.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/draggin_jeans_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/20795275723.pdfIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/pewoti.pdfIn PDF document text
    • http://jusowegakero.epizy.com/33510167082.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/free_excel_process_flow_chart_template.pdfIn PDF document text
    • http://bisiziwaros.epizy.com/81800078958.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/34307091218.pdfIn PDF document text
    • http://pabadebaluke.rf.gd/nietzsche_the_gay_science_god_is_dead.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_off0000d377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD377 4972 bytes
SHA-256: ae2162b1fdf0ba8802f8143c8fca6d82f2b278f2b03159ab89594920e39be652
font_01_sfnt_off0000e469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE469 10212 bytes
SHA-256: 68864da3e27d3592ecd885043ea8ebe199b53149bb4de876a0332b451d1121fd
font_02_sfnt_off00010769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10769 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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