Malicious PDF — malware analysis report

Static analysis result for SHA-256 328cd4a11e12f30f…

MALICIOUS

PDF

66.9 KB Created: 2020-11-19 07:13:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc722e4bfa3c6d141c22cca061e8bc46 SHA-1: e76923cb3d2ff146c7bfca542b1603e3e25e5526 SHA-256: 328cd4a11e12f30fc7baf6a71af8012002195ccc7d75d4014252113e548ebcc3
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 'https://ggtraff.ru/aws?utm_term=athulya+ravi+images+free'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, appears to be a lure related to 'Athulya ravi images free', suggesting a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=athulya+ravi+images+free
    • https://cdn-cms.f-static.net/uploads/4387825/normal_5fa55b3cafc14.pdf
    • https://sosegesidor.weebly.com/uploads/1/3/4/4/134465043/xusawujusitejifun.pdf
    • https://femitinekabel.weebly.com/uploads/1/3/1/4/131437683/ramadisosizozit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/54c2eabf-5f2f-42aa-934b-08a719be6567/10610990253.pdf
    • https://uploads.strikinglycdn.com/files/36fb9200-f956-4f34-8ed5-118de57b4994/secteur_d_activit_primaire_dfinition.pdf
    • https://uploads.strikinglycdn.com/files/89d1ac96-0c3d-4a91-b6ea-e0170d195ea4/zibowajij.pdf
    • https://s3.amazonaws.com/viromibukoleliw/project_report_on_online_hotel_booking_system.pdf
    • https://uploads.strikinglycdn.com/files/f831158e-127a-4909-b138-eeb2770b116e/viboxanaremuxujibuwabonub.pdf
    • https://s3.amazonaws.com/dudujopixejikug/2397831544.pdf
    • https://uploads.strikinglycdn.com/files/68f9154c-194c-4472-aa2a-ee9f883774ac/vafadajemevefafebixawis.pdf
    • https://s3.amazonaws.com/zamuriza/change_mailing_address_tv_guide_magazine.pdf
    • 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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b805.bin
b29f9350a720d2da9dc50567d08c4a82684db1fcb28a47e3a5788345b392d808
pdf-font-stream PDF embedded font (sfnt) at offset 0xB805 6744 bytes
font_01_sfnt_off0000c8ea.bin
53ae2c4ec7f40fafca91b48d8560208e410138ee2964c7a4c90d9a453379919b
pdf-font-stream PDF embedded font (sfnt) at offset 0xC8EA 5332 bytes
font_02_sfnt_off0000daf3.bin
81306b5088cb725cad4da408973d824f271b0b2ce96d50c41a8875bc764647c6
pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF3 10580 bytes