Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aa952fd401f63f6…

MALICIOUS

PDF

69.9 KB Created: 2021-01-12 14:09:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7cfe38adba9a49fdd18d62706eabce9c SHA-1: c8aeefb9c90ad32156737d0a9d9212a4a5238ee6 SHA-256: 5aa952fd401f63f6c7b3aefd08af6eb7ef96f0bb9b1ecdcbb9916c7f6ca92ede
184 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing trojan. It contains numerous embedded links, with at least one pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to contain keywords related to songs and applications, likely serving as a lure to disguise the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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://ggtraff.ru/aws?utm_term=banjara+song++free In PDF document text
    • https://site-1173271.mozfiles.com/files/1173271/aluminium_foil_sheet_uses.pdfIn PDF document text
    • https://site-1178047.mozfiles.com/files/1178047/voice_recorder_app_free_online.pdfIn PDF document text
    • https://site-1177469.mozfiles.com/files/1177469/free_kingmaker_balls_golf_clash.pdfIn PDF document text
    • https://site-1177918.mozfiles.com/files/1177918/gekemumegelapatuwi.pdfIn PDF document text
    • https://site-1177498.mozfiles.com/files/1177498/chicken_gun_fps_shooter_online.pdfIn PDF document text
    • https://dawurawo.weebly.com/uploads/1/3/5/3/135323901/304978.pdfIn PDF document text
    • https://site-1178778.mozfiles.com/files/1178778/english_grammar_test_for_beginners.pdfIn PDF document text
    • https://cdn.sqhk.co/fazologim/gjijbij/9-_12_months_size_guide.pdfIn PDF document text
    • https://site-1166067.mozfiles.com/files/1166067/my_verizon_fios_account_number.pdfIn PDF document text
    • https://cdn.sqhk.co/lerutefo/HChjiju/bank_robbery_luverne_ia.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d52c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD52C 5028 bytes
SHA-256: e0e487f1a80e94f8708fcc52429e0e5d5ed09c0ba94cff9b9e08777d162b5f03
font_01_sfnt_off0000e662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE662 10876 bytes
SHA-256: b8be461e4f33a66eef8d2e55f7d181b0661ef26ec7f1da1d739e34329fa788d6

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