Malicious PDF — malware analysis report

Static analysis result for SHA-256 750df211e4d59192…

MALICIOUS

PDF

79.9 KB Created: 2021-05-01 11:15:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6410fd8d5da0d756479776d96a9fc7d SHA-1: 44896e09ad0fa352d5acad0cc1f41af45306f924 SHA-256: 750df211e4d5919212390d1f66b7b2bc75a8e260c8470c5330f1cecf6e9f8cd4
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to suspicious domains, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a phishing or malicious redirection scheme, likely leveraging embedded JavaScript to facilitate the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/strik?utm_term=romeo+and+juliet+short+play+script+pdf
    • http://justamorem.com/2549719114wf0ol.pdf
    • http://mrshadow.net/tajagugixurufodotakoforx245p.pdf
    • http://yellownatural.space/mifoxubemum1b.pdf
    • https://sivubatololux.weebly.com/uploads/1/3/4/8/134850937/dc11fab014fc4a7.pdf
    • https://jukejifoka.weebly.com/uploads/1/3/5/3/135311866/8857578.pdf
    • http://titanof-filtr.ru/core_java_interview_questions_for_fresher8fj3k.pdf
    • http://about-central.com/75313527200lulb7.pdf
    • http://tells.fun/la_republica_de_platon_libro_4_resumen9cxps.pdf
    • http://safetymirrors.xyz/wrong_turn_2_full_movie_download_injlhon.pdf
    • http://copyrightsupporthelpcenter.com/betrayed_2018_parents_guidennleh.pdf
    • https://zamosokajuzosa.weebly.com/uploads/1/3/4/6/134651904/9133399.pdf
    • http://e-devletturkiyeaidatsistemimgovtr.com/old_school_bagel_cafe_menu_nutrition5p76e.pdf
    • https://xurozakewera.weebly.com/uploads/1/3/1/4/131414240/paraduviva_lerekobizuden_tutiwadoros_fevasadezola.pdf
    • https://dowolozudatu.weebly.com/uploads/1/3/4/0/134000293/807aa8de.pdf
    • http://ita-bio.space/zikonir7d39.pdf
    • http://smartcreditcheck.info/82232160731y3b5z.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pewibim/20063414526.pdf
    • https://c1f973cf-d719-4acb-8f9e-cd83ae4fb94d.filesusr.com/ugd/057766_cd8e2c531d524f3e8dd1c551bd0224fa.pdf?index=true
    • https://6f46ab72-b8e3-4ec2-8f01-cb5d6491dab7.filesusr.com/ugd/9a120b_f472a9c940724d95a34366538bc0f79f.pdf?index=true
    • https://03aaa7dd-6608-466c-a68c-f41c59811c05.filesusr.com/ugd/ae15ca_772b2ac398e04c30b49130cdecbf4a9b.pdf?index=true
    • https://s3.amazonaws.com/jujojomojemiz/66403353551.pdf
    • https://c1e7300b-80c0-415c-b28f-1ac330235641.filesusr.com/ugd/8b97dd_36da1528e1fe4d2e8051e5c881e8325a.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_off0000fa14.bin
12930d6ec3f618f052ecb20648ef4eacc5af394734bc9301a9f1d6c41184f9ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA14 5580 bytes
font_01_sfnt_off00010cf5.bin
1cf4c836ada92dbba0e2f9fbc3a9dbca417c6a960868250b59978a9add45aeb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF5 11200 bytes

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