Malicious PDF — malware analysis report

Static analysis result for SHA-256 45e2d23585864990…

MALICIOUS

PDF

75.7 KB Created: 2021-07-02 10:36:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 24b1fa6838de51efcc5dbf281859f1e6 SHA-1: 06da6e3a8cde2654d7f97a0e00d5aff75cac1b25 SHA-256: 45e2d23585864990bc3dd8b2ad4e62cc401e6633162e5f451fdf9f65e4317056
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple domains, some of which appear to be compromised or disposable hosting. The presence of a 'download button' heuristic further supports the lure-based attack pattern. No scripts were extracted, and the document body was unreadable, but the URL structure and heuristic firings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://xn--vb0b83rba554gca.kr/page_data/file/20210509125736.pdf In PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/b39628149a73934d5356e0bed11ddf42/rodonipedanilerosevana.pdfIn PDF document text
    • http://nwatchonline.net/userfiles/file/gavorugugibobewuga.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160709bee05c71---zuwekepavamabatiguponuro.pdfIn PDF document text
    • http://czdashan.cn/uploadfile/file/2021053110161173499.pdfIn PDF document text
    • http://coimbrasoftware.hu/images/uploads/files/79101292556.pdfIn PDF document text
    • http://mtecommerce.it/public/news/file/98405422591.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd00062201---42951842136.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/40e76e623aa7ace588563d34729960bf/67190258722.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608498ba04baa---60810780743.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/98472930953.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b0850b2ac40---gulorepaxu.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf5959e9db4---dakiwegemigogi.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/0900f4adecba1821db2d663cd5db5fdf/jejigis.pdfIn PDF document text
    • http://beijinghuojia.cn/userfiles/file/10508948736.pdfIn PDF document text
    • http://dunajecbiala.pl/upload/File/73059286870.pdfIn PDF document text
    • https://transpack-krumbach.de/_upload_bilder/_filemanager/file/43406515010.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/mfrp47g4jmo30hn4u4at2qldmn/pogikidilojami.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/60585612004.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/sabimu.pdfIn PDF document text
    • https://akvaguru.hu/user/file/45267532169.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=class+11th+physical+chemistry+syllabusPDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC852 15692 bytes
SHA-256: de4c3705d0bce2ce0b172c4ddedb52f28aa63acf66b3a165ea5d8f439115a6ee
font_01_sfnt_off0000f0bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000108d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108D3 10852 bytes
SHA-256: 487bcd93e461cfcf843c28bcd1c66ee0e922d9670bae6db2fdbe3ce1bc3ea165

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