Malicious PDF — malware analysis report

Static analysis result for SHA-256 58f7303f690db03e…

MALICIOUS

PDF

84.0 KB Created: 2021-09-20 01:15:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 85e6ed63e5b921080f636e0478bc9644 SHA-1: 3f144e2eea928e40d32703522ca3f1b347733b3d SHA-256: 58f7303f690db03eab763539887da29ef89f07d91ca5ae2e983756bf012f3efa
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to potentially harmful content. The presence of a 'pokemon game download apk' UTM term in one URL indicates a lure for potentially unwanted software or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://wastran.ru/uplcv?utm_term=pokemon+game+download+apk PDF link annotation
    • https://termoformat.md/img/files/tirulikimoxiragapivofok.pdfIn PDF document text
    • http://gibkrakow.pl/uploads/files/wodidotafanopukumalugi.pdfIn PDF document text
    • http://hotelamadeustorino.com/userfiles/files/12209481488.pdfIn PDF document text
    • http://faradbox.pl/files/file/senadikuguwawexutalik.pdfIn PDF document text
    • http://bjerkelunden.org/content/files/userfiles/file///fofibinizozul.pdfIn PDF document text
    • http://hightopeducation.com/cms_uploaded/file/67069181827.pdfIn PDF document text
    • http://fresh-j.info/images/uploadedimages/file/zigogaki.pdfIn PDF document text
    • http://chuanghuilaw.com/filespath/files/20210916040131.pdfIn PDF document text
    • http://aroma-es.site/yamituki-n/uploads/files/jivafoxa.pdfIn PDF document text
    • https://angelsforwarriors.org/userfiles/files/43402504647.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613abb0d946a8---regozera.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/5d4fd93935ebc24caca24187758e5328/89333630352.pdfIn PDF document text
    • https://ismart99.net/upload/files/zawap.pdfIn PDF document text
    • http://langmypham.com/luutru/files/pefipejuvolazi.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/96385788230.pdfIn PDF document text
    • https://ahl2005.com/ckfinder/userfiles/files/23789201108.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/a696f9ea9c0245b83c6a95ba233dcad9/73385677268.pdfIn PDF document text
    • https://khachsan295doson.vn/namthuan/images/news/files/11675676792.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/2c1cb443767f67106cb9556817e8ca6c/52799855077.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16147ab7fc6894---30852873725.pdfIn PDF document text
    • http://divapharma.com/uploaded/file/salowobagobodizeduwe.pdfIn PDF document text
    • http://placidlakes.com/larpm/uploads/file/21730183372.pdfIn PDF document text
    • http://print-printonline.com/ckfinder/userfiles/files/nazegugomopolapopifi.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_off0000e2b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC8 18516 bytes
SHA-256: 2dca3ecdd76a56aa902c3a0b42d252448ff246768e8c197dfe696243003c0db1
font_02_sfnt_off00012ac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AC8 10456 bytes
SHA-256: 704acb76b962d817d24e55f0c980ef24ce83173c5f24e734bcae3855ad0ac224

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