Malicious PDF — malware analysis report

Static analysis result for SHA-256 780045af64231b20…

MALICIOUS

PDF

73.0 KB Created: 2021-09-05 00:31:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: baee80fb9510791b6fd06188ba18bdad SHA-1: e044129f012763c8fce46acdb9a212ca0b45e6c3 SHA-256: 780045af64231b206f08e149609d6c3f049f48037adc3b5a2816bd2747782562
164 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm used for phishing or malware distribution. The presence of a 'download' button lure further supports this. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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 https://garglob.ru/uplcv?utm_term=environmental+engineering+2+book+pdf+free+download PDF link annotation
    • https://schlosshotel-murten.ch/userfiles/files/85299860558.pdfIn PDF document text
    • http://hankyunget.net/userData/board/file/69037798374.pdfIn PDF document text
    • http://dui-antidote.com/images/userfiles/file/85284755960.pdfIn PDF document text
    • https://10s317.com/uploads/files/202108170336062071.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6ea947c3a3---muvelabi.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608916b378649---26409305627.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe08c58c4a---xazuwikewogalijex.pdfIn PDF document text
    • https://hantverkarenisandby.se/UserFiles/files/pepiwemuxilaxilare.pdfIn PDF document text
    • https://saintarseny.ca/sites/saintarseny.ca/files/file/jetumowidepirepaloni.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/fufobofabu.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089ede9856e5---79506002388.pdfIn PDF document text
    • https://gtnet-engine.com/ckfinder/userfiles/files/47926709741.pdfIn PDF document text
    • http://slovbau.sk/test/userfiles/file/sipomolanivavuvigufameber.pdfIn PDF document text
    • http://alotercuman.com/ckfinder/userfiles/files/bopipikalubonojaneba.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/bixinibamujexovagaxem.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/dizawimedi.pdfIn PDF document text
    • http://industrialdevices.in/uploads/xuforenukeginagudepakib.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/389f2a1ebb0df2b7619e2eeb54f6b2fb/18795803619.pdfIn PDF document text
    • http://sensi-leszno.pl/userfiles/file/56627141456.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/61748059117.pdfIn PDF document text
    • http://merklink.nl/site/data/ws/files/napikejawovanune.pdfIn PDF document text
    • https://360clothing.in/home/www360cl/public_html/uploads/images/files/67392491210.pdfIn PDF document text
    • http://language-coach.pl/uploads/files/biludilazoxozukenekemusut.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16091dc947ade6---85283909650.pdfIn PDF document text
    • https://saam.vn/images/content/file/rupodi.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1610b785546e8f---povijinofubugazanonameter.pdfIn PDF document text
    • http://buildinggodskingdom.com/webcms/file/fadixegidegakeburusejuge.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_off0000b9d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d1ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1EE 11160 bytes
SHA-256: 9cbed0cbd02e38436002882c48ecf7a5945b148fd64d74a5c899375a44465da3
font_02_sfnt_off0000ebab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAB 16428 bytes
SHA-256: 592d44df8670185056ce51ad6984135e2c1914ef6d5d48027a9e456f6ce284b1

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