Malicious PDF — malware analysis report

Static analysis result for SHA-256 b06a012245a12eb6…

MALICIOUS

PDF

71.8 KB Created: 2021-09-13 21:11:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7abab66a4e5b1a6dbf62cc704bbf7f02 SHA-1: e0ab73146777eb87337b992f719f22922afb1af3 SHA-256: b06a012245a12eb600ae55b2409848dbc497e4a43b08954cbdce48323917a726
156 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites, specifically leveraging WordPress form-craft plugin upload directories to host further malicious PDF files. This suggests a phishing or social engineering attack aiming to trick users into downloading and opening malicious documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • 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.
  • 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.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16136f4f73c496---sobesige.pdf In PDF document text
    • http://co-mit.com/uploads/files/60683809103.pdfIn PDF document text
    • http://yonezawanet.jp/units/24250/zcycom/files/40189589573.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e9f53dc81e---28397559577.pdfIn PDF document text
    • http://www.golfusa.be/userfiles/files/27328504647.pdfIn PDF document text
    • https://tdemo.order-pro.com/ckfinder/userfiles/files/somodakakazu.pdfIn PDF document text
    • http://nhac.ditimchanly.org/Images_upload/files/luwurobakumidilaligipe.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16131a63eb6824---suzijidukupovoronuxozoxoz.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/bp36ibosfcph6stpe8pecnh6m0/mexikisud.pdfIn PDF document text
    • https://aznamaste.com/ckfinder/userfiles/files/manubixinitudeg.pdfIn PDF document text
    • http://thewhitmerlawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sivamodizosovapikapemu.pdfIn PDF document text
    • http://www.nbc.com.vn/ckfinder/userfiles/files/8568519911.pdfIn PDF document text
    • http://eldorautomaticgates.com/UserFiles/file/34387307700.pdfIn PDF document text
    • https://maydangson.com/vietkiendo/upload/file/22285193971.pdfIn PDF document text
    • http://crabandclaw.com/uploads/files/verimotokamipojibijaxi.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/161380555d7789---tasinuge.pdfIn PDF document text
    • http://studiotecnicoforace.eu/userfiles/files/sugakogivajugesiwur.pdfIn PDF document text
    • http://ural-resyrs.ru/data/file/lifaginu.pdfIn PDF document text
    • http://ellev.fr/upload/files/gelukixobiganalujefatenu.pdfIn PDF document text
    • http://ettermanenterprises.com/ckfinder/userfiles/files/64499813061.pdfIn PDF document text
    • http://banglenhospital.com/UserFiles/File/sijibosikelodupu.pdfIn PDF document text
    • http://status.cz/UserFiles/File/vozafan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=dictionary+apk+offlinePDF 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_off0000b672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB672 16812 bytes
SHA-256: 3a3a008cc3a995795c4e71e3ce8ed067cd7d9763c6cbc73377c07e6c7f49d7ee
font_01_sfnt_off0000e1de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f9f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F5 10512 bytes
SHA-256: a1a00855a55b2e23d5b1ebceebdaf1fd8f7d8e4d3e843ff1e504cbe48054ed32

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