Malicious PDF — malware analysis report

Static analysis result for SHA-256 389e58ed0347c0bf…

MALICIOUS

PDF

78.9 KB Created: 2020-12-28 05:41:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: e88e63cce38f4e1e824cf4a588986480 SHA-1: a6dbe231830c9f6b2af83522f8893f2e0fab1959 SHA-256: 389e58ed0347c0bf72a4d109327efe364da589d2aa1ab5bf90b7590aa1c292fc
222 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including links to known malicious redirectors and a link farm. The ML classifier strongly flagged this PDF as malicious. Although no scripts were extracted, the presence of embedded URLs and the 'Download Button' heuristic suggest a phishing or malware distribution attempt. The primary malicious IOC is the redirector URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffine.ru/aws?utm_term=aldehydes+and+ketones+notes+pdf In PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/jenefemafawal.pdfIn PDF document text
    • https://cdn.sqhk.co/dutebosatu/E3fihgq/switchback_energy_chargepoint_merger_date.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/1867598.pdfIn PDF document text
    • https://cdn.sqhk.co/nazabimon/eidhhdy/xekokete.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/53aaa64b-7312-4629-90f0-130c5619053d/roxotexunodubuxivilub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89197361-bc3a-4b54-9405-dd8d4ce9c5ca/mnemonist_memory_and_brain_training_center.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad4c991d-2ecd-4d2e-bc7d-f40f39d58dea/charles_river_bridge_v._warren_bridge_decision.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee3d6499-88d4-406a-bcb5-efd7a45da694/28646671559.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7c10cc2-d256-4f41-a215-7f47ff0f0836/76609275109.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e36a7c9-939d-4e84-b01d-50775cd44844/12653247914.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c51e2cc4-6812-486d-8f90-6ecda97e1c9c/wogeripu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee2be666-951c-422c-8079-4ba58d64f9dc/how_to_make_grey_concrete_minecraft.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ec64dfb-248e-4f95-badc-389deb7bf5c1/brother_2010_vintage_sewing_machine_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/259dcc4b-5b80-48f4-a64e-7d1999f12a81/atomic_absorption_spectroscopy_examples.pdfIn 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_off0000f793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF793 5188 bytes
SHA-256: 9a46e65ebd68b2a0b16399d40ef0b0fb98d7f29f017ecaa05bdb0e48948be64e
font_01_sfnt_off00010943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10943 10912 bytes
SHA-256: 80ec3e0d868bd783e7de0c686c120400a381ac6de46f62b884b65c6fd62f9776

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