Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ee92e97a6f5654c…

MALICIOUS

PDF

77.7 KB Created: 2021-03-16 10:14:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 3514471409cc62cc3073942482242d37 SHA-1: b965bb471738556f54cf97037291caecb6311c48 SHA-256: 1ee92e97a6f5654c603c6a43e2900d2594b1a5ae3ccf0c1f6efb33fd9e535a26
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing attempt. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, and the presence of external URIs points towards a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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 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://resalured.ru/123?utm_term=barish+ka+pani+song+lyrics PDF link annotation
    • https://tujeliwavujojow.weebly.com/uploads/1/3/5/3/135304707/2678032.pdfIn PDF document text
    • https://cdn.sqhk.co/sulubejes/ibhbFPM/40089181574.pdfIn PDF document text
    • https://cdn.sqhk.co/bevizewo/ghjbicH/animated_movies_dual_audio_free_300mb.pdfIn PDF document text
    • https://cdn.sqhk.co/wezopexa/8jekjhY/2313882477.pdfIn PDF document text
    • http://ozalupa.space/ark_snapshot_16_black_screen9tnbm.pdfIn PDF document text
    • https://cdn.sqhk.co/poxedomeke/xjggcjd/29605617820.pdfIn PDF document text
    • http://foyou.store/52288801708v5r6y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460690/normal_603e7c0b12166.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379038/normal_604cb697d58b5.pdfIn PDF document text
    • http://idealica-italy.site/3.5_e_eberron_campaign_setting4jxbs.pdfIn PDF document text
    • https://josugutidilem.weebly.com/uploads/1/3/5/3/135387313/49436.pdfIn PDF document text
    • http://honbiz.pro/2477016633299xm9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369663/normal_5fee91ae71102.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447467/normal_5ff1400a54c5a.pdfIn PDF document text
    • https://jerexibim.weebly.com/uploads/1/3/4/6/134654770/6b336ba20.pdfIn PDF document text
    • https://jimedugevebuz.weebly.com/uploads/1/3/4/4/134437071/gesekoru.pdfIn PDF document text
    • https://cdn.sqhk.co/liralimujote/LhChex5/space_marshals_2_apk_revdl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1b6fe947-be7e-4494-9a94-f566f178d3d1.filesusr.com/ugd/89064d_19d7e060b8f94513ab41b5fcca955b25.pdf?index=trueIn PDF document text
    • https://da9d63b4-fbfd-4f6f-88e7-06ac0d76355b.filesusr.com/ugd/ca300b_9c90cdb94f41494aa8a32b34a6c1cd65.pdf?index=trueIn PDF document text
    • https://4e33067b-0f13-4bed-bb9c-ea95f768fd7c.filesusr.com/ugd/23924c_e2c0d026a9da4cbabac8305ba1fe4393.pdf?index=trueIn PDF document text
    • http://bumerezuwo.epizy.com/xakuteruvovulamuginupate.pdfIn PDF document text
    • https://d9226533-59f4-4737-ae77-cfa9cdee5378.filesusr.com/ugd/d7c203_5e2997fddb7e43b99a00e758db0f87c2.pdf?index=trueIn PDF document text
    • http://nawonarubital.epizy.com/betis.pdfIn PDF document text
    • https://c06d174a-caca-4ab2-b5a0-4525cd3135d4.filesusr.com/ugd/856cea_3dd89dad9a4146ceb5bb009fae06f4ec.pdf?index=trueIn 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_off0000f283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF283 5412 bytes
SHA-256: 65e9924d0e6d60463552c9f9ee96f1cec3c59921c475d76590a0541750eef949
font_01_sfnt_off000104f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F3 10724 bytes
SHA-256: 80f38bcd8c692071e1129a00794491649451299a40a2fb2c890c41b8d000d7e5