Malicious PDF — malware analysis report

Static analysis result for SHA-256 d25af3793972d42d…

MALICIOUS

PDF

84.5 KB Created: 2021-05-02 22:22:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: ef9b85e6d6256f56ead79bd7e5f5c35b SHA-1: 059b14cbbe46503e1126a68e6c8b9a85bde63e9a SHA-256: d25af3793972d42dbc9339c426f2797b92d14eb63aa81249665128937a1c72f8
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains a large number of external links, many of which point to disposable domains or are used in SEO link farms, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites, potentially for exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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 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://soxebez.ru/strik?utm_term=trane+programmable+zone+sensor PDF link annotation
    • https://cdn.sqhk.co/doparibi/jiQHhb3/kung_fu_hustle_streaming_vf.pdfIn PDF document text
    • http://infonewsuk.site/putuwefepagotenibx8evn.pdfIn PDF document text
    • https://cdn.sqhk.co/woleparos/Jig88hh/crazy_taxi_game_free_download.pdfIn PDF document text
    • http://fastpysystem.online/how_to_get_piriformis_out_of_spasmb8r8w.pdfIn PDF document text
    • http://kurs1.xyz/17194150879682m1.pdfIn PDF document text
    • http://slimerecipe.org/bhoot_ki_photo_wallpaperirl54.pdfIn PDF document text
    • http://igme.site/jabenw8fxz.pdfIn PDF document text
    • http://fbdirect.site/left-handed_synonym_slangv03hz.pdfIn PDF document text
    • http://mail-autoscout24.net/too_big_to_fail_film_trailermc9wh.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/6806f28f-094a-484e-8b64-576ab4a8e46d/minn_kota_trolling_motor_plug_and_receptacle_36v.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da7e5baf-3c48-4be4-98aa-3e5a24704549/how_to_set_cateye_micro_wireless.pdfIn PDF document text
    • https://d6aab468-caab-4d9e-910f-d3bf64ae4104.filesusr.com/ugd/5438e3_22c7c6b197d34e69a1b0d529653786b6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/646ab352-57d9-44cf-931c-e06953de2da4/audio_technica_at-lp60-usb_needle.pdfIn PDF document text
    • https://3ecb585b-79b8-4502-8567-d9a17299c5c1.filesusr.com/ugd/4b874d_cde4bde908f24299a7272d2bcf8d6fd3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9af47867-555a-457d-a556-7b10243a5c7a/bekezumexo.pdfIn PDF document text
    • https://ca39a19f-16f9-469f-ab0b-65ec0463b8d0.filesusr.com/ugd/cc9b97_29eb4ccc7dfc48caa6e9e6cb26648016.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/765b5048-a6f5-42c1-a35e-505ecc367409/en_una_tabla_periodica_cuantos_elementos_son_naturales.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28c7bbb0-cfe7-4dbd-b1b6-2b158e256243/a_mouses_tale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c427ea30-2614-400e-a5be-13dba3a6a314/como_hablar_ingles_facil_y_rapido_gratis.pdfIn PDF document text
    • https://6acf0ca1-aa41-4771-8b91-54baff69ee7f.filesusr.com/ugd/7d1dc9_1595332464f24b5cb95db056708917cf.pdf?index=trueIn PDF document text
    • https://87b84290-c0b3-4c73-97a1-3d59c64c3f69.filesusr.com/ugd/c638b7_6806a93bb5bb4ed88f12f39a400f38f6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/89083f32-4f76-47fc-8df2-8b4838d709e6/logitech_z623_2.1_multimedia_speakers_-_200w_rms.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F1 5276 bytes
SHA-256: afb24d63e82c7866597635e41cf15403d544343a6db8a142412013655c64e7b2
font_01_sfnt_off000108d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108D0 11396 bytes
SHA-256: 3bd96f0ccc8e6d7dc92c86c51476189d2481403ef98be188940386e2636af60c
font_02_sfnt_off00012fbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FBD 16028 bytes
SHA-256: 3e66ce8c90719045bf8f6c8d5f716325bbce29c89c8399c9e71e7e90b46a9b16

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