Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a67a31b46816137…

MALICIOUS

PDF

124.3 KB Created: 2021-02-19 11:55:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc09ac8ec2070d0516b34091c38efc5f SHA-1: ee29c370e9fa52ae4e4ca5e1fba15aa4f2ec35a9 SHA-256: 1a67a31b4681613764b528b46ae4bc4e79fc458d723915aea2b42d12d13da01a
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 an attempt to phish or deliver a payload. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to trick users into visiting a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://yafferge.ru/123?utm_term=cfa+level+1+question+bank+pdf+2018
    • https://static.s123-cdn-static.com/uploads/4501028/normal_5fe3de174477b.pdf
    • https://static.s123-cdn-static.com/uploads/4418987/normal_5fdccc209b1e0.pdf
    • https://cdn.sqhk.co/puberufibo/HgijeBB/zefudusagexawusog.pdf
    • https://cdn-cms.f-static.net/uploads/4485580/normal_601dbc4e70549.pdf
    • https://static.s123-cdn-static.com/uploads/4490140/normal_5fe0cc7539777.pdf
    • http://rizovog.iblogger.org/befevofe.pdf
    • http://procripton.com/baby_pictures_wallpapers_for_androidmsaa6.pdf
    • http://panijawukufo.iblogger.org/29629869854.pdf
    • https://cdn.sqhk.co/parabeset/ahegejb/langrisser_1_and_2_remake_release_date.pdf
    • https://cdn-cms.f-static.net/uploads/4453890/normal_600b4600ef800.pdf
    • https://cdn-cms.f-static.net/uploads/4372740/normal_601d6d602153e.pdf
    • https://cdn.sqhk.co/jaxubefe/T2ghhhX/34807225943.pdf
    • http://gezudozu.iblogger.org/biblical_theology_of_worship.pdf
    • https://cdn-cms.f-static.net/uploads/4498834/normal_602213601b0cb.pdf
    • https://static.s123-cdn-static.com/uploads/4376621/normal_5fe2f5f0dcb74.pdf
    • https://static.s123-cdn-static.com/uploads/4419192/normal_5fe4377705c58.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://lotawovuvowuk.rf.gd/febutodilarefazizek.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017010.bin
cc62bc4c4402466d168dbf182478fd6830e9686c054fe57859a4550765498e37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17010 2980 bytes
font_01_sfnt_off00017ac9.bin
a22c46d6c081583ebc317e8201476cce86e03c270fa3f4f09cb0fe90b4fb3f00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17AC9 5752 bytes
font_02_sfnt_off00018e7e.bin
08e44ae8c7f0393ffd4d377d1aa5b7ebbabb68a25c62584d1881be7e5fcb2486		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18E7E 16948 bytes
font_03_sfnt_off0001bcd5.bin
f38fab3de4781fdca3a8c258415a98623ac8a23069338c7037cfe56418180fb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BCD5 16396 bytes
font_04_sfnt_off0001d2fb.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D2FB 4324 bytes

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