Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc245191ea2edbd4…

MALICIOUS

PDF

85.7 KB Created: 2021-03-22 09:14:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b27e4ea045be1ab8f06c2fbb4b455722 SHA-1: 796119de96d71781a7d7692d65c51801f9f61afb SHA-256: cc245191ea2edbd45b1bcef63b19019aaf68e21770f3ea5a796d7512dd870d4a
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, forming a link farm, and is flagged by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly indicates maliciousness. The embedded URLs suggest an attempt to redirect users to malicious sites, likely for phishing or malware distribution, disguised as search results.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/award?keyword=estructura+de+la+amilosa+y+amilopectina+pdf
    • https://rasozonikazip.weebly.com/uploads/1/3/4/9/134904665/714460.pdf
    • http://vazawujuzu.sportsontheweb.net/james_and_the_giant_peach_summary_chapter_36.pdf
    • http://potuduwatolebu.mywebcommunity.org/nenolu.pdf
    • http://pipavinekiga.mywebcommunity.org/7277756883.pdf
    • http://wivaserana.mywebcommunity.org/xodejutirofudijebuwa.pdf
    • https://misapunuzure.weebly.com/uploads/1/3/1/6/131606411/xokibagis-radev.pdf
    • http://dumubemajizukov.medianewsonline.com/can_i_upload_my_dna_from_myheritage_to_23andme.pdf
    • https://furivupes.weebly.com/uploads/1/3/5/2/135295821/fumokolo-gemijamiwajufo-nebizowoxakuw-zilowosekeze.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kugelilizibuwum/atmsfera_unam.pdf
    • https://s3.amazonaws.com/fasomusogapovi/56163150166.pdf
    • http://siniligavaxuvul.onlinewebshop.net/divonusikijili.pdf
    • https://s3.amazonaws.com/zamuriza/nubej.pdf
    • https://s3.amazonaws.com/ragejufa/liverpool_vs_arsenal_match_report.pdf
    • https://05e27880-d5e1-4d3d-8428-ba943e9300bc.filesusr.com/ugd/b56239_882211b733224c82982102778ca0e59f.pdf?index=true
    • https://18b62485-dce0-4e35-9712-b1d1f13fcb23.filesusr.com/ugd/296484_037b2b2fc2b940e7baec32e36cc3b31f.pdf?index=true
    • https://s3.amazonaws.com/rekorewexidiwo/cdc_flu_vaccine_administration_guidelines.pdf
    • https://d3df31c7-72fe-42b1-a92e-0723e8ed7a16.filesusr.com/ugd/5bf82b_42c19cd3374f461bb5a3979068ef71d6.pdf?index=true
    • https://151dec52-cf20-477b-a401-a68195eead79.filesusr.com/ugd/8538f4_f924dffbe99347c9be112f4e27a6f696.pdf?index=true
    • https://8b7199fc-a029-4910-8138-caee300d1cbd.filesusr.com/ugd/da8f68_03546ff1f97349c8bbda2ba4284f939e.pdf?index=true
    • https://dc6b22d1-fd3c-476a-b8f1-b0505981f591.filesusr.com/ugd/ab5adf_78c7744283da466ca5ed99abdffaa53c.pdf?index=true
    • https://30c74dc1-c3f2-4e71-8253-1ec84f3b94e1.filesusr.com/ugd/b8c6fa_7cf99112a456430e9b076503e50838c1.pdf?index=true
    • https://dc010c70-835d-4b56-8cb0-1e1bda7cab64.filesusr.com/ugd/fb576b_13478fb674c3467d96d4a45eb1ca7827.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8e9.bin
a8a3a1489623cf40b75c32b6bfd8b064060d87f175efcc4208caa7dbacc79987		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E9 5360 bytes
font_01_sfnt_off00010b1c.bin
965d8429fd32f0ec4cc6df43491ae66724d5499655eedbc4ab6526d3824115e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B1C 11868 bytes
font_02_sfnt_off000131ee.bin
e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x131EE 16204 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.