Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d2919507655cfa8…

MALICIOUS

PDF

77.6 KB Created: 2020-12-27 13:42:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 8c6c9a352efac3b29cc2e975678c9244 SHA-1: 67a767bd5a76d44d1ff934d449e4f569630269cd SHA-256: 1d2919507655cfa8993a72b0a588cc391b55555b65e2aba5e479ebdeee568355
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by multiple heuristics, including a critical alert for a malicious redirector link and a high-confidence ML classification. The embedded URL `https://ggtraff.ru/strik?utm_term=word+forest+free+word+games+puzzle` is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ggtraff.ru/strik?utm_term=word+forest+free+word+games+puzzle In PDF document text
    • https://cdn-cms.f-static.net/uploads/4405950/normal_5f972896a9e37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401983/normal_5f985011ec4de.pdfIn PDF document text
    • https://cdn.sqhk.co/wotudasigeb/ba7j0hc/zubasebobuxomagunig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378386/normal_5fa86b114599b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451229/normal_5fdd0a908aedb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470967/normal_5fbb31c297a45.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468531/normal_5fc66c3411a5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392862/normal_5fb2c123a06df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451225/normal_5fade58142a6e.pdfIn PDF document text
    • https://cdn.sqhk.co/moradivovep/Xgi1igw/math_tricks_for_fast_division.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/bccfa640-99df-4e2e-818d-909b33949b76/wopotafapugajitebifor.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/12170343959.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f96f27f6-c700-40af-9517-eef070940d19/oxygen_electron_configuration_pattern.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_off0000f1ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EA 5516 bytes
SHA-256: c50340adb97de119b5ec75c6d236dcfebe49b19afd86d1a45a3c4a4f5502e7d0
font_01_sfnt_off000104be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104BE 11080 bytes
SHA-256: 9571caf90605a01a9da9bfe2f30e627256e008d27986875cf0d93dcef038e6d9

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