Malicious PDF — malware analysis report

Static analysis result for SHA-256 d47825771483976b…

MALICIOUS

PDF

67.7 KB Created: 2021-01-19 16:50:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: bdff74407147e6a99432a18fa9088d81 SHA-1: 6526ae2bfb09696059b6d07aab0dd49c50fe0d08 SHA-256: d47825771483976b33099c7088c9127c19336d286cf707feb0c2fdac23b91e9a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The ML classifier and ClamAV detection strongly indicate maliciousness. The 'ClickFix' heuristic suggests the document attempts to trick the user into running a command, likely to download and execute a second-stage payload from one of the embedded URLs. The 'Callback Lure' heuristic further supports a social engineering pretext, possibly related to fake billing or support issues.

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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffe.ru/aws?utm_term=best+pdf+to+word+converter+nitro+online PDF link annotation
    • https://site-1176609.mozfiles.com/files/1176609/42644472572.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470825/normal_5fbc3c5169757.pdfIn PDF document text
    • http://kijorifoweb.22web.org/camera_scanner_premium_apk.pdfIn PDF document text
    • https://site-1195189.mozfiles.com/files/1195189/nespresso_gemini_cs_200_user_guide.pdfIn PDF document text
    • https://site-1236495.mozfiles.com/files/1236495/63592719168.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421471/normal_5fd619d385171.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369491/normal_5fc1482226e3e.pdfIn PDF document text
    • https://site-1173140.mozfiles.com/files/1173140/alarm_siren_sound_not_working.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459780/normal_5fcd1b81207d8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://faxajipemafeb.epizy.com/33728067302.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/japejizosapesosa.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/23738972468.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/rivasaxijaniw.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/tixepogukusixoxifufa.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromopelurab/comedy_video_3gp_tubidy_io.pdfIn PDF document text
    • http://kirogebi.epizy.com/zixedozun.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_off0000cbe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBE1 5140 bytes
SHA-256: b759319fd0669a69758da39716ccabfaa624707f0ce694b87071f3609894d4e9
font_01_sfnt_off0000dd8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD8F 10568 bytes
SHA-256: 8b2e7fa658a6cffc83585e948868137aa184e905ef00d5d4f67b1b1c78d193d2

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