Malicious PDF — malware analysis report

Static analysis result for SHA-256 036bcdadcd266eb0…

MALICIOUS

PDF

91.7 KB Created: 2021-03-31 05:44:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 7bb6e9ead57a79b6339bd3c5671dde67 SHA-1: 1d8d520bdd3eaa9a26a375b449b72c2fdd28108b SHA-256: 036bcdadcd266eb0da4130fa0897543e8c73720b4cbdffc6de251c668068ce86
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including ClamAV detection and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, suggesting it is part of a link farm designed to redirect users to potentially malicious websites. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external URIs strongly suggest an attempt to deliver a second-stage payload or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://xajibur.ru/123?utm_term=difference+between+resistor+capacitor+inductor+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4489057/normal_6009a9c45878c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484814/normal_5ff52629f14a6.pdfIn PDF document text
    • http://reduslim-europa.site/download_surat_yasin_dan_terjemahann8b6w.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498883/normal_6005b3a445039.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446151/normal_6035ef769514e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494677/normal_5fcd7376e0897.pdfIn PDF document text
    • http://kusadelopo.iblogger.org/nedidutuporalagu.pdfIn PDF document text
    • http://gasokab.iblogger.org/a_level_physics_syllabus_zimsec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375075/normal_600d9b903a6c9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469119/normal_5ff55b2f64f98.pdfIn PDF document text
    • http://golden-bridge.pro/puwizifuwiwuvitoq0x2.pdfIn PDF document text
    • http://yachts-4-sale.com/195129679275h3iy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://divimere.epizy.com/lajukonejufe.pdfIn PDF document text
    • http://bujepefu.epizy.com/is_free_sat_good.pdfIn PDF document text
    • https://a540aa65-2eb1-4ac3-86d0-bf6a54daac96.filesusr.com/ugd/2d797c_4080219dc5074b8a9b8219c614db3b96.pdf?index=trueIn PDF document text
    • https://6ddb26ad-aa8e-4a3e-a925-5cef6fc035e1.filesusr.com/ugd/d3d820_b2483ba53ffc40a8b1b9d6b6f62e50ec.pdf?index=trueIn PDF document text
    • http://favagapararo.epizy.com/sevuzazarunebibulom.pdfIn PDF document text
    • https://3b0fe5ff-7f86-489c-8138-fc984e51136c.filesusr.com/ugd/bfd78a_afbb8449af8a4cec90a52b356d9dccab.pdf?index=trueIn PDF document text
    • https://b354d503-40d1-4c97-84b4-bc0b16c12f35.filesusr.com/ugd/8c7d07_5b7e539632c04e0197484c5b825ded8f.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B1D 5232 bytes
SHA-256: 0723d9a6fe6a2325b0eb039b522ff9388a38b699d0cf44cb15723733820c13f8
font_01_sfnt_off00012d01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D01 11124 bytes
SHA-256: 01d9162e4bb0a50acbc78c9151de5bdc58e21e0aaed32041b51997cf9c3f00e2
font_02_sfnt_off000152e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152E7 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

Open this report in the interactive analyzer, or submit your own file for analysis.