Malicious PDF — malware analysis report

Static analysis result for SHA-256 58da892a631aa5eb…

MALICIOUS

PDF

81.9 KB Created: 2021-01-12 13:37:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59cd4289aab0b0875bab3526464e9952 SHA-1: bdf03713d704aefc1da30a0a10fdd5ac7c49ed3e SHA-256: 58da892a631aa5eb41737e89fee2527099e438dbc34b4dd896a6a94809fa44ea
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ggtraff.ru'. This URL is presented in a context that suggests a phishing lure, likely related to downloading an 'emoji premium apk'. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=emoji+premium+apk
    • https://cdn.sqhk.co/dodufiruw/cYWieah/what_does_hotlinking_not_permitted_mean.pdf
    • https://site-1179234.mozfiles.com/files/1179234/30767437616.pdf
    • https://site-1168287.mozfiles.com/files/1168287/messages_not_syncing_between_iphone_and_mac_catalina.pdf
    • https://cdn.sqhk.co/manuguwe/vidhfOu/8807947213.pdf
    • https://site-1168429.mozfiles.com/files/1168429/free_robux_for_roblox_cheats_and_guide_app.pdf
    • https://site-1173634.mozfiles.com/files/1173634/tusaxelininolafatowosiz.pdf
    • https://cdn.sqhk.co/mixenezir/eYEhahg/voa_news_radio_frequencies.pdf
    • https://site-1180086.mozfiles.com/files/1180086/keseginakodejinuwubapib.pdf
    • https://cdn.sqhk.co/lunapolakezo/dPSighY/bouncy_castle_rental_houston.pdf
    • https://cdn.sqhk.co/tofegejij/bgiM1gc/95777367691.pdf
    • https://cdn.sqhk.co/kozuvurop/gjifyt1/fetuvugakufajozewo.pdf
    • https://site-1182802.mozfiles.com/files/1182802/cake_decor_ideas_easy.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efb6.bin
c1a1dc64673d30859217a6f316fb12a293bd73ef1032dcba4f807416b1c3f8e2
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB6 3656 bytes
font_01_sfnt_off0000fcc9.bin
83649550920dc002c5d16bcf4bf0d994e380f9e28ad66af7f0bf232c8cf63e76
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC9 4852 bytes
font_02_sfnt_off00010d33.bin
51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D33 1800 bytes
font_03_sfnt_off000115c1.bin
c1d98303e729d862070cb9966addbb345e2d0c240c0997c4f63ea5459000426e
pdf-font-stream PDF embedded font (sfnt) at offset 0x115C1 10600 bytes