Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a7583c239327f52…

MALICIOUS

PDF

77.5 KB Created: 2021-04-04 16:40:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 2284cf5ee573f64652665e7685219ce3 SHA-1: 27677cce7ed6c70360d2a2cec6059311836b4dfa SHA-256: 7a7583c239327f52467ff7da9da137e5646d409d3d1f9eec6757f5870624fb23
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as a lure for a "heart touching sad love story video download". The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of numerous links on disposable hosting further supports a malicious campaign.

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://seumenha.ru/strik?utm_term=heart+touching+sad+love+story+video+download PDF link annotation
    • http://googsnat.space/nursing_cover_letter_template2jxbk.pdfIn PDF document text
    • https://cdn.sqhk.co/mitebosareki/j2CggbN/61679814039.pdfIn PDF document text
    • http://xosudodobuj.iblogger.org/anganwadi_form_2019_up_last_date.pdfIn PDF document text
    • https://cdn.sqhk.co/podoxato/bxXFuii/horizontal_line_test_one_to_one.pdfIn PDF document text
    • http://goodxday.xyz/lonesezipipejugewarasebcraz.pdfIn PDF document text
    • http://bisipatelaloguj.66ghz.com/dus_bahane_remix_song_pagalworld.pdfIn PDF document text
    • https://cdn.sqhk.co/sapugelezuf/e1if083/90277196852.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • http://microbladingcertificationdfw.org/24353117948jaqkh.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/echbif2/81853445562.pdfIn PDF document text
    • https://cdn.sqhk.co/sifujubagis/dkUZhKW/mirefix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rewosawobew.rf.gd/how_to_share_someone_elses_business_page_on_facebook.pdfIn PDF document text
    • http://kabixiti.rf.gd/sahih_bukhari_download.pdfIn PDF document text
    • http://dekuroveki.rf.gd/california_secretary_of_state_form_llc-_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd4ca822-9448-43df-8f49-23785a80fd16/lowex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0dec62a-2fb9-45de-9372-0dcbe821fff2/connect_samsung_tv_remote_to_vizio_sound_bar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b23d3875-13ad-47c0-a52f-bf276b324e2d/what_does_the_learners_permit_test_consist_of.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f15d430-bef7-4529-bce2-db4215134184/zone_of_proximal_development_3_stages.pdfIn PDF document text
    • http://bigepuvuxo.epizy.com/11559411342.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e51fa351-4c25-4d96-8b5a-32bb792a718a/pefulinolonegofades.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD387 5416 bytes
SHA-256: 0a5e1274f66d23fcaac1a74f8aa183296e26e9822e84db23fe02881c449c3910
font_01_sfnt_off0000e602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE602 9988 bytes
SHA-256: ec00b96c8e3bf6426cd71bc5dae45a1d08c033ed9df4e846bfd5fdd10c80a76c
font_02_sfnt_off00010840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10840 18776 bytes
SHA-256: e58e8e8d3617fa2f52d62469859eb662c26c1c1537dc21f5cc6f1aa71eaa6aed

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