Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed77543411c4b415…

MALICIOUS

PDF

76.0 KB Created: 2021-03-23 16:42:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 5cb9dc4832e02ade2e587159d28ee1ff SHA-1: 21024f962db0c0eb2baef21bc64e1db633987363 SHA-256: ed77543411c4b415bb18970e32f458e23b9ee7b788fc7036728f71c32b6698b0
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 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://druttle.ru/123?utm_term=are+you+ready+in+spanish+formal PDF link annotation
    • https://cdn.sqhk.co/dilizilozok/gghMgdw/the_dictator_2012_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/famuxina/qhjic00/kaxekisejilakafimete.pdfIn PDF document text
    • https://cdn.sqhk.co/tovasodoj/ijsjh0a/mtn_pulse_data_plan_night.pdfIn PDF document text
    • https://tivurenufetoza.weebly.com/uploads/1/3/4/2/134235987/zezere.pdfIn PDF document text
    • https://cdn.sqhk.co/rasepotobami/ijd99qt/75436978261.pdfIn PDF document text
    • http://ponopawux.iblogger.org/12_std_biology_book_in_gujarati.pdfIn PDF document text
    • https://dolilugufup.weebly.com/uploads/1/3/0/7/130776220/vasiguror-dozeworija.pdfIn PDF document text
    • https://nirumoxizexajiv.weebly.com/uploads/1/3/4/5/134524745/nasibunavafokodorom.pdfIn PDF document text
    • https://jajadonafusava.weebly.com/uploads/1/3/4/0/134040597/6613594.pdfIn PDF document text
    • http://laura-egorova.ru/73798555755d9q6d.pdfIn PDF document text
    • https://cdn.sqhk.co/sotatixorawi/hgLgiRO/wujarajosifixanefop.pdfIn PDF document text
    • http://megahit.space/puzilutofenoxisoxemugonavr9gv5.pdfIn PDF document text
    • http://wiinorama.space/css_the_missing_manual_5th_editionu9swi.pdfIn PDF document text
    • http://2022god.com/how_to_train_your_dragon_4_full_movie_in_english_2019cy2op.pdfIn PDF document text
    • http://eurofamily.pro/bexebilazotiux6h.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/35c6eb1f-91ff-4633-b909-9a8c14be1021/the_maze_runner_1_movie_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/933de841-c3e3-48d2-b957-5c8d304de1e2/56744295251.pdfIn PDF document text
    • https://s3.amazonaws.com/liluvad/sudden_attack_2_free_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1f25bf1-7aae-41d4-b193-03732571d6ac/74902553086.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/97585642230.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/946f76e2-d0bd-412d-b23f-2bf1ff79fc1b/cuentos_de_eva_luna_isabel_allende.pdfIn PDF document text
    • http://famuruvif.epizy.com/22644256752.pdfIn PDF document text
    • http://diwifesatikebak.epizy.com/68338450860.pdfIn PDF document text
    • http://kejarajavamoge.epizy.com/courts_of_heaven_prayers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fa473ab-2b2c-4395-8120-764c44cd8a42/90195001434.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/zuviwik.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_off0000e92a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE92A 5372 bytes
SHA-256: cb18c486de7b4fcf5c254da61a55c441103897c9745c60e8d8f8a1615f054f47
font_01_sfnt_off0000fb52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB52 11936 bytes
SHA-256: 036bea22d2c05bc778748f019d3c26c1fb8d33d4e82db83d0905f6c60d510b8d