Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cabf1affa7bfb2d…

MALICIOUS

PDF

95.3 KB Created: 2021-05-09 12:01:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 660097eae675a9499bdf5c2b40caa6fa SHA-1: 7c9ad58b6846daebc793756768f36da9a52d0f37 SHA-256: 1cabf1affa7bfb2db49f0f0e80a4cda707dd16bb651b7c51d2b5b61ecf28633a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to 'maypoin.ru', suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed to host many links on disposable domains, further supporting the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/strik?utm_term=soundcraft+default+password PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366350/normal_5fe94004bccc9.pdfIn PDF document text
    • https://cdn.sqhk.co/dusivubeleza/UijKijM/kelakafovanidutaj.pdfIn PDF document text
    • http://momentikshop.space/jupiter_merlin_income_factsheethof4q.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445735/normal_6009d067214a1.pdfIn PDF document text
    • https://cdn.sqhk.co/lexaxemiji/3mgjihT/top_10_telugu_ringtones_free_download.pdfIn PDF document text
    • http://bizbize-yeteriz.org/bavetegalejo1ti5.pdfIn PDF document text
    • http://jimupitakonumi.iblogger.org/28136298629.pdfIn PDF document text
    • http://sokfresh.fun/3151303923lx3ub.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/jaloto/bhojpuri_video_song_hd_new_2018.pdfIn PDF document text
    • https://e668d0bc-6b9c-4787-ac64-5363b724ef62.filesusr.com/ugd/6ec699_201a2811322d47fcb680966388a9ddfc.pdf?index=trueIn PDF document text
    • http://vufuwuxe.epizy.com/vegilonisugugidinopu.pdfIn PDF document text
    • http://lesiwemazab.epizy.com/secure_connection_error_return_code_16.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/biology_questions_and_answers_multiple_choice.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/cashflow_quadrant_book.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/88239025414.pdfIn PDF document text
    • http://neriwapawegos.epizy.com/bomag_8500_parts_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/46301637677.pdfIn PDF document text
    • https://78ff948a-0765-49f5-a22c-0fbe0eba7848.filesusr.com/ugd/888d0b_29457c9d948a4d7384e47e117832095f.pdf?index=trueIn PDF document text
    • https://2cc935b2-b854-4d3d-8499-e3bac5ec7384.filesusr.com/ugd/2e82fc_3aeb41fce1c942868c2e28b2474b1b52.pdf?index=trueIn PDF document text
    • https://1618b3f4-dcc0-4047-a816-eeb1cbe43c51.filesusr.com/ugd/a01749_4b3e2fd21916482e8bdbad7edbf792a3.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012dbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DBF 5344 bytes
SHA-256: 92d144922ec535dcc54aa9b94ed36f761ad47256781970d3af3f2a081c7cfe9c
font_01_sfnt_off00014008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14008 2076 bytes
SHA-256: 26c746d8a21c50ad21e30d74cf30b24ab4a33d794d089756bbfc207ec540187f
font_02_sfnt_off00014909.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14909 11228 bytes
SHA-256: ab5513652c0deffc200f7608254e9cd807359051beee38950aa07285af122a11

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