Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c7f6a730cf0accf…

MALICIOUS

PDF

72.9 KB Created: 2021-02-21 11:04:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: e8c0304da181c32c72d2ff0acb95ec84 SHA-1: 5af110fc17ccf77b9e2e7b80395cca0ec73270ba SHA-256: 5c7f6a730cf0accf09cbffb44d2dd145289decb26a5f94a89732abea654d1bb1
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 or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://crophysi.ru/strik?utm_term=attack+on+titan+movie+trailer+reaction In PDF document text
    • https://static.s123-cdn-static.com/uploads/4415974/normal_5ffd570e08fa5.pdfIn PDF document text
    • http://mosasekoz.22web.org/adobe_scan_app_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427526/normal_6003dc48aa42a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368979/normal_60092df77da2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408186/normal_602df223807a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462374/normal_5fd0da0bd8b57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413845/normal_600cb7dc209b7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470679/normal_5fcdb657a0509.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387709/normal_602a82b2e5d20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375361/normal_6010c50c676a5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/delta_10_table_saw_replacement_fence.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/kathal_arangetram_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/33796357413.pdfIn PDF document text
    • http://roluvad.epizy.com/29554266965.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/gojadubit.pdfIn PDF document text
    • https://s3.amazonaws.com/budovewesekaz/fonakaladunosuv.pdfIn PDF document text
    • http://gofosuxubajo.epizy.com/game_beach_buggy_blitz_apk_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/boaters_license_quiz_answers.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_off0000dfcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFCF 4880 bytes
SHA-256: 54ab618042178213ce0dc1355b78aba88a2d752cc7b7929240355e061a010d7c
font_01_sfnt_off0000f058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF058 11144 bytes
SHA-256: ff36abafcf51f1a22ed4a68892f356f584e70db8a871955bc5aa4fee1f95cf4c

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