Malicious PDF — malware analysis report

Static analysis result for SHA-256 eacb1bc47db6854e…

MALICIOUS

PDF

72.3 KB Created: 2021-05-11 12:31:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c7b7c086856729dc62eb5ab7ddd496f9 SHA-1: a77bb4413c2153f94d29a95dfe54611dd06f0acd SHA-256: eacb1bc47db6854ec7a2999e845b99a63c5f48b175791262f4d31a874adbc561
186 Risk Score

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 0.9998

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://xajibur.ru/strik?utm_term=troy+bilt+tb360+parts+diagram PDF link annotation
    • https://vewuwoxefi.weebly.com/uploads/1/3/1/3/131379256/5274582.pdfIn PDF document text
    • https://cdn.sqhk.co/gelowidabik/gcgdijX/85259534377.pdfIn PDF document text
    • http://rivepozepuxar.mywebcommunity.org/43210717463.pdfIn PDF document text
    • https://siputewebototab.weebly.com/uploads/1/3/4/4/134480832/bixevuxewup.pdfIn PDF document text
    • https://rikusinifo.weebly.com/uploads/1/3/4/0/134017093/dujitovidasug.pdfIn PDF document text
    • https://zoxiniguve.weebly.com/uploads/1/3/4/5/134584112/4d3021.pdfIn PDF document text
    • https://lonaxixa.weebly.com/uploads/1/3/1/4/131413275/9021412.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvomuvugu/gfhjibe/rainbow_metallic_adhesive_vinyl.pdfIn PDF document text
    • http://gejokakop.mygamesonline.org/catechism_of_catholic_church.pdfIn PDF document text
    • https://cdn.sqhk.co/temirikuji/fcN1CWZ/wawolokuxu.pdfIn PDF document text
    • http://xofelivigavas.mywebcommunity.org/skin_cancer_information.pdfIn PDF document text
    • https://cdn.sqhk.co/fujotojaxob/rJchbik/21884655993.pdfIn PDF document text
    • https://cdn.sqhk.co/ramidazumiko/ibhenge/vixuvataxago.pdfIn PDF document text
    • https://cdn.sqhk.co/kakezesarop/ayhbTib/fleabag_series_parents_guide.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/pivetuzadujo/realidades_3_textbook_page_62.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/74147114930.pdfIn PDF document text
    • https://a8a70d16-e3f0-4805-b115-4d8c62c40b57.filesusr.com/ugd/82e28d_a428406fdf2a4129abda32c3dee73d26.pdf?index=trueIn PDF document text
    • https://b70645e9-42d7-44c6-80f2-f165c8819e8d.filesusr.com/ugd/3f1130_b73a42e122474debb6211d417cdcb2d4.pdf?index=trueIn PDF document text
    • https://48b7024d-7414-4593-b44d-ed892b96ad15.filesusr.com/ugd/3e5db3_913048ee83cf471fa72b90a5b55707a9.pdf?index=trueIn PDF document text
    • https://178c1879-e916-404b-9861-a2431bd0f83a.filesusr.com/ugd/1aace6_d390c5a29ad4457e9f826e880cd55371.pdf?index=trueIn 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_off0000da93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA93 5928 bytes
SHA-256: e952cb0ca5317f39e63ebd59d72a97fdae7a11027dd150a623535aab74eb41ef
font_01_sfnt_off0000eeaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAA 10456 bytes
SHA-256: c960e666a7268f2407d8f0a445799aff521835b654b9352c5161c3dc417ddac0

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