Malicious PDF — malware analysis report

Static analysis result for SHA-256 19464a3fd803e5c8…

MALICIOUS

PDF

79.3 KB Created: 2021-03-17 17:44:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0008877f179c62f029226fe6c1a84d67 SHA-1: af7acb97f1b295a0ac04c5ac0d128914162a91d5 SHA-256: 19464a3fd803e5c8414e23440945fab6eeaa9d0484275c76b60115e725fad4b2
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs that redirect to link farms hosted on disposable domains, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or serving a malicious payload. The document body, though heavily obfuscated, appears to be a lure related to a search query, suggesting a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://baarspo.ru/wix?keyword=what+is+an+example+of+consent+of+the+governed+in+our+society PDF link annotation
    • http://fastnoutservice.ru/jotilexabirulewofitajeduyhx36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378605/normal_60279046d1599.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365549/normal_60028eb37109e.pdfIn PDF document text
    • http://boxberry-24.cc/war_as_i_knew_it_patton7v3sj.pdfIn PDF document text
    • http://sokolov.fun/161597331821l3st.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372377/normal_602cf406dc09b.pdfIn PDF document text
    • https://zuginapox.weebly.com/uploads/1/3/2/6/132695273/pokofe_nuzomozunijimu.pdfIn PDF document text
    • https://vaxurubezinijor.weebly.com/uploads/1/3/4/6/134690270/mubuxiriwutos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449193/normal_60450087bd1db.pdfIn PDF document text
    • http://womans30planet.com/25352174662tolsk.pdfIn PDF document text
    • http://erogan-encolumbia.site/xinupijugarikosuzewek3sc0n.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/bidivo/asbestos_sheet_disposal_procedure.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/45787975341.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be882b42-5181-43e9-9008-b78185839c75/1478957112.pdfIn PDF document text
    • https://2a983b51-2e13-4971-8c1f-a5bca3ab4353.filesusr.com/ugd/e1a791_3b461f4849e04e518ca3a7d63fe2890c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0801267f-007c-41a8-be75-22dee831ea36/63719328739.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51ffbc53-dad8-4ae9-a0fd-e6b4daf65285/sony_hdr_cx405_vs_cx240.pdfIn PDF document text
    • https://9e7b01ce-91ce-414a-93c5-ade8df4b7359.filesusr.com/ugd/cfbfd2_1e97d517be2c4d1599b1f9c35135e7bc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ninazarila/12049294406.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30658ab5-a87d-47dc-8276-4ae94c78114f/kubla_khan_analysis_shmoop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53b45f62-e7f6-4786-b2c8-cb74b69d93e8/libro_santillana_fisica_1_bachillerato.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_off0000f901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF901 5812 bytes
SHA-256: 7b7ba7f16ff2d111d1b2734168950b43a1792c60ecd1bfbe8f254ac75fce1442
font_01_sfnt_off00010cbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CBB 10644 bytes
SHA-256: a06c7cd63eb21babe66079499ea4266064d50714e5f78df3740773f74c39f546

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