Malicious PDF — malware analysis report

Static analysis result for SHA-256 12a58eff5536f2ab…

MALICIOUS

PDF

70.7 KB Created: 2021-05-17 23:53:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 01e028b84715cbb2203ec97782a6ca12 SHA-1: ba4fca93247c15b0f9b8cd66cc4ec39d9eaee6f2 SHA-256: 12a58eff5536f2abaf6b82ca1989637589b419a438486d39d130f1cd84858688
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document, possibly leveraging embedded JavaScript for obfuscation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/wb?keyword=formatos%20de%20minutas%20en%20excel PDF link annotation
    • https://getelomivono.weebly.com/uploads/1/3/0/7/130776590/lidan.pdfIn PDF document text
    • https://vizekufebatovut.weebly.com/uploads/1/3/1/3/131382320/202069.pdfIn PDF document text
    • https://depuxozepol.weebly.com/uploads/1/3/4/3/134377374/8981674.pdfIn PDF document text
    • https://zojubexetiw.weebly.com/uploads/1/3/5/3/135316795/232f82e.pdfIn PDF document text
    • https://vagonegasix.weebly.com/uploads/1/3/1/4/131482995/3152155.pdfIn PDF document text
    • https://fojevatiseme.weebly.com/uploads/1/3/4/4/134400043/wifebimenig_wizewadede.pdfIn PDF document text
    • https://zaxizibu.weebly.com/uploads/1/3/4/6/134672664/sunusoxave_fagosunebizon_vafemog.pdfIn PDF document text
    • https://kafolegilu.weebly.com/uploads/1/3/2/3/132303068/1711573.pdfIn PDF document text
    • https://fuxiwuzepideka.weebly.com/uploads/1/3/1/3/131381491/2991862.pdfIn PDF document text
    • https://zukuvexoxowi.weebly.com/uploads/1/3/4/5/134597017/fegofowuk-bibovu-lozomelov-xezulibojiwafes.pdfIn PDF document text
    • https://pebetojakudasud.weebly.com/uploads/1/3/4/8/134879391/5975646.pdfIn PDF document text
    • https://wodumipanopova.weebly.com/uploads/1/3/4/7/134731655/8332908.pdfIn PDF document text
    • https://dawekemukodo.weebly.com/uploads/1/3/4/4/134491409/rinupifebadixa.pdfIn PDF document text
    • https://fawewetipe.weebly.com/uploads/1/3/1/3/131379545/fixalujam.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/ece23037-2c9c-428e-b995-e3cae6b25f23/the_house_of_night_tv_series_cast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d77aca5-0bf4-48a8-a60a-7f2230d8f0e5/best_suppressor_for_remington_700_308.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21a8faac-3991-4942-b5e6-6fe339b9ef14/how_to_make_a_terri_bow_with_ez_bow_maker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f71220c-27a2-47c1-8e8e-5342add650eb/how_to_lose_weight_while_weight_training.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69a06f09-5d3f-4eb1-9c63-33b7dc059896/volamifanon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cff16d3-e6af-4e8b-91b4-7ec4e4b2347d/39649426019.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_off0000d4bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4BC 5108 bytes
SHA-256: 268d3c1bfc9b2c611ef19c45c44c6a1ac7694b9187bfdfc6731f8f38cec44bab
font_01_sfnt_off0000e602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE602 11640 bytes
SHA-256: 89ab910190279eedfbb658f732f5f796e7a36bca6d0b2553bed24621fe070f88