Malicious PDF — malware analysis report

Static analysis result for SHA-256 f29ec01603930fe4…

MALICIOUS

PDF

45.6 KB Created: 2020-10-09 03:19:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d1a8d5c2db05f1e89b66eee79216f06c SHA-1: eabfc1ead5156353777f1c774e25be8375cbcb59 SHA-256: f29ec01603930fe4713e2ff77a6f10565fa634d922cb94056dfdd9bdf719a74e
124 Risk Score

Malware Insights

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

The PDF contains embedded URLs that lead to a redirector service, which is a common tactic for distributing malware or unwanted software. The ML classifier strongly indicated maliciousness, and the document body, though heavily obfuscated, contains a URL matching the redirector. The presence of numerous links to disposable hosting further supports a 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://ttraff.club/pify?keyword=pandora+internet+radio+apk+free+download In PDF document text
    • https://site-1037000.mozfiles.com/files/1037000/sajewomopolawojiza.pdfIn PDF document text
    • https://site-1040216.mozfiles.com/files/1040216/livupedowaxapebap.pdfIn PDF document text
    • https://site-1037869.mozfiles.com/files/1037869/rapesovesafuvivuvanugi.pdfIn PDF document text
    • https://site-1042777.mozfiles.com/files/1042777/32542501758.pdfIn PDF document text
    • https://site-1038765.mozfiles.com/files/1038765/58412309639.pdfIn PDF document text
    • http://files.drjesspshatkin.com/uploads/1/3/1/4/131453136/zikide_tavetizasidep.pdfIn PDF document text
    • http://files.peaceoffaith.net/uploads/1/3/2/6/132682030/ecf012f77e9.pdfIn PDF document text
    • http://files.evangerlutheranchurch.org/uploads/1/3/1/3/131384436/wobugebi_tonazef.pdfIn PDF document text
    • http://files.yogabrixen.com/uploads/1/3/2/7/132740914/1855442.pdfIn PDF document text
    • http://files.erickjramirez.com/uploads/1/3/0/8/130874679/f37266cbefa2999.pdfIn PDF document text
    • http://files.sacazeandpartners.com/uploads/1/3/0/8/130873872/dubanalaxutalajir.pdfIn PDF document text
    • http://files.moiliilicc.org/uploads/1/3/1/4/131454492/tejij-vuxuxudiguwi.pdfIn PDF document text
    • http://vusaxujuj.class66data.net/uploads/1/3/0/7/130775034/xizopov-timefetaxadiwaz-pesoxo.pdfIn PDF document text
    • http://files.daniwilliamson.net/uploads/1/3/2/6/132682193/wufokaripoz-jegorevutimekaj.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68A6 5016 bytes
SHA-256: 6b2d2384655e34a98e98fa5a1b11535851b0cbafa91b323438c45f37e7a79ebd
font_01_sfnt_off000079d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79D1 1936 bytes
SHA-256: 246569b5fd7226bd0ebf3c016de7ba0bf82e996896d660a08030b2af0a08efd3
font_02_sfnt_off00008312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8312 11028 bytes
SHA-256: 0daaa168e66bc510cf87697cff44e4a5f8efb38cda4fc814f1ec85eb92ad20ca

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