Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ed214e7845a321c…

MALICIOUS

PDF

87.4 KB Created: 2021-09-15 18:51:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3628463db7db6d1d4107434eb38a8650 SHA-1: 7afdde171abda3721acd5f714df740cc9d772f78 SHA-256: 0ed214e7845a321c2375284772a03c579bedf315c8105c051227733d2a061118
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs pointing to various websites, many of which appear to be compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded URLs and the nature of the heuristics strongly suggest this PDF is used as a lure, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://queure.ru/uplcv?utm_term=pronoun+rules+pdf PDF link annotation
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613e204a29218---dojowuxubiderul.pdfIn PDF document text
    • http://getwealthythisyear.com/ckfinder/userfiles/files/72330155131.pdfIn PDF document text
    • http://yakutiaprime.ru/SITE/files/editor/file/judojegedezevedetutemek.pdfIn PDF document text
    • http://chiangmaicharmingtravel.com/ckfinder/userfiles/files/99391105256.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/kajenasax.pdfIn PDF document text
    • http://rydelko.pl/userfiles/file/lavonidejajapa.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16131db2505b00---pagadawixo.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/2b4dc57c8ba724bd9bba6551b3628c90/12352982517.pdfIn PDF document text
    • http://ficfart.org/userfiles/file/bavifikowobixukorokabap.pdfIn PDF document text
    • https://www.elshandmadedesign.nl/ckfinder/userfiles/files/4779373079.pdfIn PDF document text
    • https://flcevent.fcu.edu.tw/plugin/ce1/ckfinder/userfiles/files/20210913015605.pdfIn PDF document text
    • http://custom-mugs-factory.com/uploadfile/files/51079005020.pdfIn PDF document text
    • https://shreenathtechnologies.com/userfiles/file/rametisusakekuves.pdfIn PDF document text
    • http://xn-----6kcaheblih5ab0a6afqbzoqe.xn--p1ai/ckfinder/userfiles/files/80847843431.pdfIn PDF document text
    • http://harc-ias.vn/Images_upload/files/71975769134.pdfIn PDF document text
    • http://e-sheremet.com/img/fezebunedojepunejew.pdfIn PDF document text
    • http://hoclaixebinhthuan.com/upload/contentFile/file/21399276570.pdfIn PDF document text
    • http://140.121.180.103/ckfinder/userfiles/files/13317175695.pdfPDF link annotation
    • http://krukaiart.com/userfiles/files/kawazazowikogarafunubizor.pdfIn PDF document text
    • http://foxgraphics.paulsfashion.in/files/61213383157.pdfIn PDF document text
    • http://creativecoms.net/userfiles/file/daxukinamulaz.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_off0000f342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF342 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010b54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B54 17940 bytes
SHA-256: d48841b1a06b4b258fce90e7f28ad3b50de585bedd79c809271e90521a859a6e
font_02_sfnt_off000139a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139A2 10240 bytes
SHA-256: 0d3c9fa766494bddbabf6b8c03c5bb75161d4926122fe1498d8c8cdac2fbcae5

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