Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0e70f208298d38f…

MALICIOUS

PDF

83.4 KB Created: 2021-09-23 12:01:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a7cca8210961b74a1ac2e68a05fa4dc6 SHA-1: 54d5d6f9fe3b678bf87d7d68b7803515cb0e2ae9 SHA-256: a0e70f208298d38fcefa7877317ad9602ea28ade380d78dd52dd3b1649cb6ba9
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is identified as a link farm, suggesting a malicious intent to redirect users. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware distribution. No scripts were extracted, but the extensive use of external links points towards a content-driven attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://catamma.ru/uplcv?utm_term=minecraft+apk+lucky+block PDF link annotation
    • https://www.funes.gob.ar/ckfinder/userfiles/files/26710428021.pdfIn PDF document text
    • https://parisnordmedical.fr/docs/file/68602236893.pdfIn PDF document text
    • http://hwayoung.kr/upfile/files/zedulemutisivegomel.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/6315868837.pdfIn PDF document text
    • http://chipgene.com/image/files/20210910_150836.pdfIn PDF document text
    • http://fonnepal.org/userfiles/file/2951645523.pdfIn PDF document text
    • https://firesystem.ro/imagini_ws/34197044496.pdfIn PDF document text
    • http://armanetti.com/images/45009299748.pdfIn PDF document text
    • https://questyme.com/userfiles/file/95280657622.pdfIn PDF document text
    • http://acudrved.com/ckfinder/userfiles/files/xewibumetumuxejeg.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/xurodure.pdfIn PDF document text
    • http://kinel-hunter.ru/upfiles/file/dagadeze.pdfIn PDF document text
    • http://sonhanint.com/uploadpic/sun/files/202109192155544281.pdfIn PDF document text
    • https://saatyapi.com/upload/ckfinder/files/wutenoruzadetovojofem.pdfIn PDF document text
    • https://jackyrouxmethode.com/userfiles/file/lokuwatelebuzar.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/86327219f503bcff1ad975a37f7e55dc/loxewugemure.pdfIn PDF document text
    • https://xn--p3t29jo1ed4o4xw.tw/upload/files/13194689264.pdfIn PDF document text
    • http://tensoinox.com/userfiles/files/xirunopigorelekepo.pdfIn PDF document text
    • https://fasaac.org/temp/files/32500045447.pdfIn PDF document text
    • https://shivajigrihnirman.com/singhania/downloads/file/wefifetixe.pdfIn PDF document text
    • https://ulsantour.com/FileData/ckfinder/files/20210920_18C8D41075BBC6BF.pdfIn PDF document text
    • http://stavclearing.ru/upload/files/kidafitubejogeveporet.pdfIn PDF document text
    • http://gtlitalia.com/userfiles/files/kemewos.pdfIn PDF document text
    • http://wernitznigg.at/files/midijekebu.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000daea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAEA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF301 10744 bytes
SHA-256: 665fd334ec3e90bb8d0e8c7c4b369871ee0e28be653053462ec0214ac384ebb9
font_02_sfnt_off00010b9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B9D 19852 bytes
SHA-256: 9aacce396d8a47252fa0927ef19a30168548a95d9b97be0cc88e41d85efebf7b

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