Malicious PDF — malware analysis report

Static analysis result for SHA-256 f79f158d304ff562…

MALICIOUS

PDF

79.7 KB Created: 2021-03-13 22:24:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 0b4fc99c022182d0c70adbf2f5b85691 SHA-1: 11d7e6163157ba388d414d98fb3cd9a66c85c95e SHA-256: f79f158d304ff562a206f50674e1e5eec33614ac7043819106b9b39de49aba57
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 is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites, potentially for downloading unwanted software or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/wix?keyword=ios+7+emoji+keyboard+apk+free+download PDF link annotation
    • http://xubajur.mygamesonline.org/zefifere.pdfIn PDF document text
    • http://verifedform.com/twilight_saga_breaking_dawn_part_2_songs_listagh30.pdfIn PDF document text
    • http://kafujaguvo.mygamesonline.org/15476114480.pdfIn PDF document text
    • http://palikexifumalam.mywebcommunity.org/51890341703.pdfIn PDF document text
    • https://cdn.sqhk.co/legifenobir/6Jvudhj/mafibafodibaleguxar.pdfIn PDF document text
    • http://alcexpress1.xyz/floaroma_town_sheet_music7nhal.pdfIn PDF document text
    • https://cdn.sqhk.co/pavoraxebute/iiii7yN/296553796.pdfIn PDF document text
    • http://dozusudifajew.22web.org/65811240671.pdfIn PDF document text
    • http://vkrowl.com/28858286437c373a.pdfIn PDF document text
    • http://cryogen.me/34079331113w0ba6.pdfIn PDF document text
    • http://de-bewertung-id-q2e5t23.top/41420534557iiw2k.pdfIn PDF document text
    • http://boost-store.net/madness_combat_project_nexus_2_gameplayzjg09.pdfIn PDF document text
    • http://zakewabo.scienceontheweb.net/laundry_symbols_chart.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/705bbd44-2114-49d9-8bed-4cb22c3422fe/que_es_ser_un_lider_de_jovenes_cristianos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd213f95-6f88-42b8-bde6-77e79bf0bbd1/1061898960.pdfIn PDF document text
    • http://bumejefivoxigo.myartsonline.com/jevijemoloremer.pdfIn PDF document text
    • http://kigitom.epizy.com/printable_world_time_zone_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79dc036e-1b15-479b-bad2-4bf5a18d1fda/ruletifo.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_off0000e1df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1DF 5680 bytes
SHA-256: fbb7dbbf7dcd7972f8f32e7356984c70fb2a5ea888f9daeec2ba34c57bd32863
font_01_sfnt_off0000f535.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF535 12036 bytes
SHA-256: 0c48b070e667ccc4f27466662819b8f7f123d81a3b71adcae2337752b5f526fd
font_02_sfnt_off00011c67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C67 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848

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