Malicious PDF — malware analysis report

Static analysis result for SHA-256 3deec2098504876a…

MALICIOUS

PDF

46.6 KB Created: 2020-10-12 08:14:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ee2c2d7fa6abb0930041809acf0f6f1c SHA-1: 686db32594aad7d86e4b0379821eecf444a99d7b SHA-256: 3deec2098504876a3b6d03bc2604e7ef76dabd476f977aae50b1eebe59eaa286
124 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains references to 'aloha browser premium mod apk', suggesting a lure for users seeking cracked software. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous links to disposable hosting reinforces the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/strik?keyword=aloha+browser+premium+mod+apk In PDF document text
    • https://site-1036868.mozfiles.com/files/1036868/munosuruxifedudibalapag.pdfIn PDF document text
    • https://site-1036761.mozfiles.com/files/1036761/veselemujudixirebaj.pdfIn PDF document text
    • https://site-1042095.mozfiles.com/files/1042095/ziboge.pdfIn PDF document text
    • https://site-1036886.mozfiles.com/files/1036886/28476054320.pdfIn PDF document text
    • http://soludefux.leeloosesotericorner.com/uploads/1/3/1/1/131164250/77803aaada77d3a.pdfIn PDF document text
    • http://xenuxaniv.greenstonedoors.co.nz/uploads/1/3/2/7/132740470/xilumuxosej.pdfIn PDF document text
    • http://files.ceffortwayne.com/uploads/1/3/1/0/131071277/bapalado_tebemuzepa_xunabij_givobiz.pdfIn PDF document text
    • http://files.kingspointpottery.com/uploads/1/3/1/3/131382243/rumepol.pdfIn PDF document text
    • http://files.susannabonaretti.com/uploads/1/3/1/3/131398472/xasokov_gasuzekeresukex_xusez_fetus.pdfIn PDF document text
    • http://files.boaianimalcentre.org/uploads/1/3/1/4/131437418/rejiwedinomuximosovi.pdfIn PDF document text
    • http://tinizetod.crescentwaves.co.uk/uploads/1/3/0/8/130874493/nimanofowatex.pdfIn PDF document text
    • https://site-1038898.mozfiles.com/files/1038898/zevokolugovariwalikesixo.pdfIn PDF document text
    • https://site-1042939.mozfiles.com/files/1042939/80103919532.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61DD 5484 bytes
SHA-256: 270cc24dbf618bfe413b91d2d4ecf43e2ffadb3e47530590e56adca67e5f2af1
font_01_sfnt_off00007465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7465 10288 bytes
SHA-256: 24f40a219cbc2e1e258d545ddc96cbd007b0b45d5ad61981dbb59b7f0acbc5b4
font_02_sfnt_off000097c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97C2 16332 bytes
SHA-256: 2a247a753e8a01f70d7fcfa74e2d7baad7259a755652018209d99d19020bd12c

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