Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cbd6e8a0c73ccb6…

MALICIOUS

PDF

82.8 KB Created: 2021-09-08 00:31:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: febdae1b1b964651aa77c5b20b0a431f SHA-1: 19d4eeb3f5a69aa2a191f964c21c4ba274c56b57 SHA-256: 2cbd6e8a0c73ccb69609ab7555ae7805a1bcee32326cc853a75d0200f47fc9da
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, indicating a link farm designed to redirect users to malicious content. No scripts were extracted, but the overall structure suggests an attempt to lure users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://liftsystems.ro/LiftFiles/file/mozesifibupobiku.pdf In PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b62df599e62---38750152387.pdfIn PDF document text
    • http://whatdwellswithin.com/file/59747064384.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b2087948e62---78316237200.pdfIn PDF document text
    • http://elateridae.com/images/FCKeditor/file/14219859118.pdfIn PDF document text
    • https://shoppingplanet.ro/ckfinder/userfiles/files/zekobinufurifur.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/b750e6509f3ee9a3aaae288aeb578b4f/1173411472.pdfIn PDF document text
    • http://onlineexpert.in/userfiles/file/repalafepavamazegila.pdfIn PDF document text
    • http://pusheng168.com/uploadfiles/20210719195920.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/72745339504dec83fdccf11a95b231d2/bagixigugipowelezizoj.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/2efb9b7a606af49818fee5086a196f52/gezeferiz.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/lotusezejosi.pdfIn PDF document text
    • https://sapsda.org/SapmaUserfiles/file/rexaxeti.pdfIn PDF document text
    • http://fusheng-vietnam.vn/admin/webroot/upload/image/files/vavumopowubowez.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/7hk9lqau8g5blesm21rsju48jq/84311739123.pdfIn PDF document text
    • http://dexgerm.com/data/file/userfiles/files/6867502540.pdfIn PDF document text
    • http://kraski-chernila.ru/resources/file/wufimasilesudasijap.pdfIn PDF document text
    • http://dfwarbitrator.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/73536726623.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/c190ebacf5720c132e3659fcfe5810a6/lixivaxilozusilajiri.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/a5083c03f76b41067f0b59c96eb3292a/15599135175.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/jubuxojim.pdfIn PDF document text
    • http://mariondhuique-mayer.com/data/file/83760789013.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4dec871d17---17563518216.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b0b2fe3d7aa---fesuge.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=2001+pontiac+sunfire+manual+transmission+fluidPDF 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_off0000dcf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF508 11080 bytes
SHA-256: 526422e5528d4653f964381bb5a818b25b790c6ca605739505e1a90a9d0ca136
font_02_sfnt_off00010ee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE1 18104 bytes
SHA-256: 321ceffa8d201f0c8b5907e5108ea10812f0b2de137442a654126b1d165be789

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