Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea36c1830436b656…

MALICIOUS

PDF

98.1 KB Created: 2021-03-16 03:55:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04ae826236ae83d7c7112830a5cb94a0 SHA-1: 7ee98977968738eb7673bc16fd1c878b26ec5851 SHA-256: ea36c1830436b6569652432c7beb43029463523e80476320519c42053881054b
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM'. The presence of the URL 'https://ponafet.ru/123?utm_term=django+queryset+to+list+template' and the ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' strongly suggest a phishing or malicious redirection attempt. The ML classifier also flagged this PDF with a high score, reinforcing the malicious nature.

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=django+queryset+to+list+template
    • https://static.s123-cdn-static.com/uploads/4421780/normal_5fcae8c333f48.pdf
    • http://warajuvevuv.medianewsonline.com/synonyms_words_list_download.pdf
    • https://cdn-cms.f-static.net/uploads/4472208/normal_5fe7c03ca6978.pdf
    • https://static.s123-cdn-static.com/uploads/4413851/normal_5fe00fc03ae94.pdf
    • https://pojebozotez.weebly.com/uploads/1/3/2/6/132695867/melel.pdf
    • https://sexaxekeka.weebly.com/uploads/1/3/5/3/135313825/daneleji.pdf
    • https://talovilivakalod.weebly.com/uploads/1/3/5/3/135326419/6e087fb7d8e.pdf
    • http://gexopidikimo.mygamesonline.org/which_book_of_enoch_is_the_best.pdf
    • https://gedimonisesejed.weebly.com/uploads/1/3/1/1/131163996/doluz-zadepesomano-nilibigokaf.pdf
    • https://static.s123-cdn-static.com/uploads/4385434/normal_5fce6a548eacd.pdf
    • http://suberubepuparo.getenjoyment.net/calidad_de_vida_segun_la_oms_2020.pdf
    • http://mumolazesinidix.getenjoyment.net/bitixomudoluzizazefanugu.pdf
    • https://nojabepeteguki.weebly.com/uploads/1/3/4/6/134669956/viwip.pdf
    • https://fotavisemaro.weebly.com/uploads/1/3/1/4/131406710/lalixorig.pdf
    • https://kebakiwaranug.weebly.com/uploads/1/3/4/3/134317860/xatepizugo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://724418e0-3ace-43c1-abd8-628b4820fc71.filesusr.com/ugd/6df952_36beabcd8acb483ba92f633035e2cded.pdf?index=true
    • https://bcbc83ff-a82b-4234-bf1d-c69e8cae54d5.filesusr.com/ugd/057c82_05e57b02f5ba440ab3ede771ed4b5803.pdf?index=true
    • https://d99d9bf7-a5e0-49f2-90ac-0d1bc881463d.filesusr.com/ugd/0182ef_2b7c4bf66c964ddf8aedb3e947292034.pdf?index=true
    • https://6200e599-3f2f-4e3e-ab45-e6977ed7e777.filesusr.com/ugd/f8de3e_56c6df90d0b74a5a987b313af8cd2971.pdf?index=true
    • https://737c154f-ca75-4484-807d-9d5c19d76377.filesusr.com/ugd/7e84b7_2249528a84274cb4a7f9ec3303dd775c.pdf?index=true
    • 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_off00013d13.bin
3d974db37d4b96c8d790ed35790e4874bcb7256dc53ff3bc7a5883d9790d5f5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13D13 5444 bytes
font_01_sfnt_off00014f94.bin
a5fe905626b6acf84dc4acf71ba6f8f99bece06dd8699fc124012d0b91bf6b88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14F94 13376 bytes

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