Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0bb483ae022a56b…

MALICIOUS

PDF

75.0 KB Created: 2021-02-19 05:53:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 695db5e7b91a8ec9966e7942b88e4691 SHA-1: 28f872d854afad77721d5a6bfc80824d6644fe1f SHA-256: e0bb483ae022a56b3aa0ca59d8b198afba61110e10b2ea9d8f4f8c96f394f4b5
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating it is a phishing or trojan PDF. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or redirection mechanism. The document body, though heavily obfuscated, contains text related to origami, likely a lure to disguise the malicious intent. The presence of external URIs and the overall structure strongly suggest this PDF is designed to lead the user to malicious content or download a secondary payload.

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://jottigo.ru/123?utm_term=how+to+make+a+origami+heart+bookmark+step+by+step PDF link annotation
    • https://cdn.sqhk.co/xulawajikigi/idKzhjc/54957226567.pdfIn PDF document text
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/6852571.pdfIn PDF document text
    • http://bafutazipavev.iblogger.org/kisah_ashabul_ukhdud.pdfIn PDF document text
    • https://femovoba.weebly.com/uploads/1/3/0/7/130775826/mikewezabe_mewelef.pdfIn PDF document text
    • http://jegotaraxipux.iblogger.org/14635921401.pdfIn PDF document text
    • https://zakazorexan.weebly.com/uploads/1/3/1/4/131407051/bufiruregov.pdfIn PDF document text
    • https://simokenuma.weebly.com/uploads/1/3/5/3/135311421/6906800.pdfIn PDF document text
    • https://cdn.sqhk.co/ramazunor/D7jiBC3/jaxotaxorilesuwop.pdfIn PDF document text
    • http://nititozokepukam.22web.org/camera_plus_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/nenuguvan/hjgjG0v/70489359302.pdfIn PDF document text
    • https://tujozidu.weebly.com/uploads/1/3/4/6/134694944/zifiv_gugil_golikefojel.pdfIn PDF document text
    • http://sosunimepewe.22web.org/sowazekutolibuxixaxuboxo.pdfIn PDF document text
    • https://jumedewumeba.weebly.com/uploads/1/3/4/3/134310957/38ef1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dezajok/4390691686.pdfIn PDF document text
    • http://jobifizokugo.rf.gd/95472591690.pdfIn PDF document text
    • http://vupileloluxus.rf.gd/video_er_link_free.pdfIn PDF document text
    • http://legibevisavu.epizy.com/85684627170.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_off0000e5fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FC 5560 bytes
SHA-256: 14ee4c18d97088c16b4133517f9888e60fe0dadf010662ce6d8201b56bca038e
font_01_sfnt_off0000f8cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CB 11004 bytes
SHA-256: 7b1dffc5349d84ebfe3f792d078a35c31e7ff811c91a89dce4c7fb8805f65055

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