Malicious PDF — malware analysis report

Static analysis result for SHA-256 7db8db37f38600dd…

MALICIOUS

PDF

73.5 KB Created: 2021-01-22 05:50:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 66caf37548c56ef5c45996d1a53fc22c SHA-1: de0264baad18dd69de596ad4b4b047e20ee58f46 SHA-256: 7db8db37f38600ddc1302ea0061a8532db1eea680be496f9e51c8fa5f81a7311
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing attempt. The document body, though heavily obfuscated, suggests a lure related to 'basic medical terminology pdf'. The presence of embedded URLs and the ML classifier's high confidence score further support the malicious classification. No scripts were extracted, but the primary attack vector appears to be directing users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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.
  • 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://gettraff.ru/aws?utm_term=guide+to+basic+medical+terminology+pdf In PDF document text
    • https://cdn.sqhk.co/wakivugex/jtjiijL/jewaputixaz.pdfIn PDF document text
    • https://cdn.sqhk.co/pegipoveridi/e7zShc6/mor_sansar_ma_cg_song_mp3_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473023/normal_5fff62f7bdee9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388617/normal_5ffa27bba1f75.pdfIn PDF document text
    • https://site-1173983.mozfiles.com/files/1173983/69309481589.pdfIn PDF document text
    • https://cdn.sqhk.co/domuzusud/iikhfQq/coffin_nails_medium.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450721/normal_5ff90332443e5.pdfIn PDF document text
    • https://cdn.sqhk.co/kurafuso/jbTgdhb/47747432199.pdfIn PDF document text
    • https://cdn.sqhk.co/susiwozobo/aighcFB/knight_of_wands_love_reading.pdfIn PDF document text
    • https://cdn.sqhk.co/vameduvide/i99jcgd/17673139799.pdfIn PDF document text
    • https://cdn.sqhk.co/suxupijisajo/bjbihtW/42055152687.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421943/normal_600a03a2e0cfd.pdfIn PDF document text
    • https://cdn.sqhk.co/satovepato/Ug2iihe/22222754861.pdfIn PDF document text
    • https://cdn.sqhk.co/jakufomego/4dJjbhe/xagugasoturinogupep.pdfIn PDF document text
    • https://cdn.sqhk.co/vadetegubufo/zWWxiiA/34754987190.pdfIn PDF document text
    • https://cdn.sqhk.co/mujexoxa/R9Thdgc/seattle_bus_rush_hours.pdfIn PDF document text
    • https://site-1192771.mozfiles.com/files/1192771/916086301.pdfIn PDF document text
    • https://cdn.sqhk.co/xanutabe/DggIPXr/19663767832.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_off0000e2bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2BF 5748 bytes
SHA-256: a0eeb716b449231ecc00237aa7197f1e425efd6cc28ac575f9cd709187477d09
font_01_sfnt_off0000f648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF648 10180 bytes
SHA-256: 005ccb64e9785d6c2dc1505978a40d1a90207ceecbb75b92682bbff388302a67

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