Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcc6348ca24bbf92…

MALICIOUS

PDF

68.5 KB Created: 2021-03-04 19:51:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 21f1a4cbffad0f2ec64178540cb82ae5 SHA-1: 7db84cd669372415ac5ccc3d625567ae78c3c30c SHA-256: fcc6348ca24bbf928885331ed2f71294e7908645dbd2966ab8f7fd2027f36454
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains a large number of external links, suggesting a link farm or phishing attempt. One of the primary external links, https://ponafet.ru/123?utm_term=neato+robotics+xv-21+battery+issue+0002, is suspicious and likely leads to a malicious site. The presence of PDF_SEO_LINK_FARM heuristic indicates a large number of external links, likely for SEO manipulation or to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/123?utm_term=neato+robotics+xv-21+battery+issue+0002
    • http://donimiradibekel.22web.org/barcelona_vs_athletic_bilbao_match_report.pdf
    • https://kojelokawuzu.weebly.com/uploads/1/3/4/3/134341929/dumoroxez.pdf
    • https://migigagabigugam.weebly.com/uploads/1/3/0/7/130775968/1743538.pdf
    • https://xelewutoritawi.weebly.com/uploads/1/3/1/0/131070131/8749661.pdf
    • https://miboxijudowisu.weebly.com/uploads/1/3/4/4/134491333/320cbc9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://46c19374-600d-43be-a5f2-d8bf07c6fddf.filesusr.com/ugd/cc94a4_3bad0676823545e9b580bf97e8a70d4b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/283ce8c9-0cd6-47a7-b7a7-41be8e29ed36/lawn_boy_522r_snowblower_oil_change.pdf
    • https://c0cead0d-5248-483d-940e-95cc3acd9bde.filesusr.com/ugd/20d83a_9de70caa6577445f9b716fa0996d35ff.pdf?index=true
    • https://uploads.strikinglycdn.com/files/89d49444-9dac-4035-8823-acbd94d4e062/whats_in_mcdonalds_breakfast_sausage.pdf
    • https://uploads.strikinglycdn.com/files/ba29ca9d-bf6f-411d-9608-aedcfa327f7a/26385639166.pdf
    • https://uploads.strikinglycdn.com/files/c61e78a4-d5ea-4133-a02f-7eb82a68750b/xuzosewagepituvamulodi.pdf
    • http://poniweja.rf.gd/delukotivanatilosoj.pdf
    • http://bibibojusajol.rf.gd/61570495051.pdf
    • https://1b65b899-5fad-42bd-af9e-a3fb1d6a4c80.filesusr.com/ugd/a2ebd8_7c52c846458448ff8fd464185869f04f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/7dfdd42e-0242-4e5f-9bd1-cb478699e483/zakagiwesut.pdf
    • https://uploads.strikinglycdn.com/files/0f0c5be8-6d0e-4ff6-a619-11bd7f3e2227/sawefixorulu.pdf
    • http://feluwagosipo.rf.gd/gilosiluwotupezojove.pdf
    • https://uploads.strikinglycdn.com/files/04b2b1ca-e87c-437a-ba4d-51b852d73427/wedanozi.pdf
    • http://gesesasogibigaw.rf.gd/california_style_manual_citation_cheat_sheet.pdf
    • https://uploads.strikinglycdn.com/files/a5305817-52c9-406e-ad81-905a1c5985ad/debimimizep.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb05.bin
96772e66c5d446eab661b5569c3ddb056b99308cc04834d17ce0dc70b570ced0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB05 5460 bytes
font_01_sfnt_off0000ddc4.bin
7805180ac796f0e0a7969c150f71e84b35d170a561088d397a3dd526534f4148		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC4 10952 bytes

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