Malicious PDF — malware analysis report

Static analysis result for SHA-256 8953772508395039…

MALICIOUS

PDF

86.5 KB Created: 2021-07-31 01:27:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 3ccdcc25957a3e7543b83eaf7e7a4fd5 SHA-1: c4f989004a336a57ff387d1c34fbcc38969b03f2 SHA-256: 8953772508395039d26e9a398db79fc449df675c34ad577a6ad7ffeabbad900a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm pointing to compromised WordPress upload directories, suggesting an attempt to host malicious files or redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160751091ada27---maxudutulitamifula.pdf In PDF document text
    • https://dpengineers.info/admin/userfiles/file/21183841127.pdfIn PDF document text
    • http://sanmargholidays.com/ckfinder/userfiles/files/37048711192.pdfIn PDF document text
    • https://clickkedai.com/userfiles/file/83178409085.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/d5e387c8f6a507efc047bc51313bceec/40688911300.pdfIn PDF document text
    • http://motoren-adachi.com/js/upload/files/48075441107.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d531866fd---bebopefakunobolas.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a411db5ba1c---vabej.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee28e8e88fd---53522172337.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/jopetisotivapi.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/878ae21ac6f3c41a97989737b6f6f9bd/34592713534.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160f3f7c0bac81---12390972657.pdfIn PDF document text
    • http://herbwaterthailand.com/userfiles/files/2913428572.pdfIn PDF document text
    • http://sola-brothers.com/userfiles/file/punozejolidufowasinidog.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/950c467cee6fbbe9c813515166e878d5/8659565737.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0ff38a229---tesaluneditikinonazon.pdfIn PDF document text
    • http://demirtepe.org/userfiles/file/vuxosepuzabolimu.pdfIn PDF document text
    • http://artechq8.com/beta/uploads/files/ribulafe.pdfIn PDF document text
    • https://isabellepieman.com/userfiles/file/80053396052.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1608f0cb8b83d5---xujovesobesixi.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8619bbc033---64895392999.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1cd4bf1ea---bizegi.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/noralegaxuwubat.pdfIn PDF document text
    • http://agarimo.com/archivos/archivos/gebobebabizoduwovubo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=imaginarium+mountain+rock+train+table+toys+r+usPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE968 18916 bytes
SHA-256: 94b46a8bbd1d2bfcf4a92f153d3550462eedb8fd6c1436ade012dadbbd64fd32
font_01_sfnt_off00011aeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13302 10968 bytes
SHA-256: e86e90ef0cd2b37ece29eac6dd8e9e5f75e0d7f7881cf2c2cc5a28d9eb3b4a48

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