Malicious PDF — malware analysis report

Static analysis result for SHA-256 da03fcdbab991840…

MALICIOUS

PDF

74.4 KB Created: 2021-02-23 00:31:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 5cbefdcee5ca33bb68bb3a9ee967dfdb SHA-1: 33e76581b699a0d624b1051fb6f6d4d76cc95839 SHA-256: da03fcdbab991840bbe80015f2cd496dd810d7833d2df057eeb4fe47d2b219fe
136 Risk Score

Malware Insights

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

The sample was identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of an advance-fee scam lure. The embedded URL, https://jacksth.ru/strik?utm_term=programming+fundamentals+using+python+infytq, likely serves as a redirect to a phishing or malware distribution site. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://jacksth.ru/strik?utm_term=programming+fundamentals+using+python+infytq PDF link annotation
    • https://cdn.sqhk.co/wodelaganav/iaOjdQp/toss_the_buddy_throwing_game_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452839/normal_601b61dac5f7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496582/normal_602783504459b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408703/normal_600f5c0955ef3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370265/normal_5fe11a3e83496.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412575/normal_5ff0d70a2ab2f.pdfIn PDF document text
    • https://cdn.sqhk.co/xenumobavun/rK1jbEe/edible_art_cake_shop_raleigh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443578/normal_5ff0a82ed0332.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374843/normal_5fc7459525de0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499629/normal_600a626335a93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414871/normal_60342c02aea7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417327/normal_601bba968ac98.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/igjgejb/padevubinipovo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388608/normal_5fd66cc63a30a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418788/normal_5ffbe0fde3aa0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368736/normal_6012275517d38.pdfIn PDF document text
    • https://cdn.sqhk.co/mewivupa/hcjaoij/music_idioms_definition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427783/normal_60340f11dbfb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426690/normal_602d413822a7b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wevedikelu.epizy.com/fazujatajarojumokut.pdfIn PDF document text
    • http://botasalipigu.epizy.com/wumomonijemenenejudodewur.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_off0000e2ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FF 5684 bytes
SHA-256: 1b26226e2d8cb211da24ca4321a14897a8dd86dd89e798c55c28d23b7d257231
font_01_sfnt_off0000f62b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF62B 11480 bytes
SHA-256: bceed2c03867836d846cda09f7754c00075bd02d05a1184d73b054b92fa6588e

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