Malicious PDF — malware analysis report

Static analysis result for SHA-256 73150e904605bc25…

MALICIOUS

PDF

78.4 KB Created: 2021-09-19 03:32:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: eba5adf42e857175962f100a19a41d57 SHA-1: c7889d209f7663e279e548d2cd2013a6d5fa1b76 SHA-256: 73150e904605bc25740ea963cd7780cee20965611c3bf58cab7a3cc099140a5f
164 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised websites or disposable domains, indicative of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL findings align with techniques used to lure users into potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://laborke.ru/uplcv?utm_term=yes+man+watch+online
    • http://aptekarynek.pl/zdjecia/fck/file/28434129523.pdf
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/7691f75ea7596f0ee4b69febe1fd22d3/22574662120.pdf
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1613407148d543---sogotevunavumanafe.pdf
    • https://ls-machinery.com/uploadpic/files/202109080628581798.pdf
    • http://filtrydokoparek.pl/img/all/roxixolitukezekam.pdf
    • http://twinmd.ru/userfiles/file/xirokoredaboguwikibemaku.pdf
    • http://amunt.madteam.net/ckfinder/userfiles/files/bozuditowopesatejajuli.pdf
    • https://www.shipgo17.com/plugin/ckeditor/ckfinder/userfiles/files/wuxududeragukorowinejopuj.pdf
    • http://sonsuadogo.org/Images_upload/files/3186955379.pdf
    • http://www.superior-inkjet.com/login/ckfinder/userfiles/files/zuxopudipariwubafine.pdf
    • https://korovin.org/site/img_ufiles/99135281658.pdf
    • http://isemya.by/modules/ariol/static/ariol/ckfinder/files/71005555007.pdf
    • https://netwindowvn.com/uploads/userfiles/file/gepivusa.pdf
    • https://madame-tina.com/ckfinder/userfiles/files/wazapoxefa.pdf
    • https://www.cdsale.org.au/application/third_party/ckfinder/userfiles/files/76081402326.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/161461ea653a17---safovudafaxofituxaze.pdf
    • http://canadianrockies.ca/files/file/tijaseja.pdf
    • https://rotitelor.com/contents/files/gibesokujavodebapepape.pdf
    • https://klubkanine.com/home/klub/public_html/ckfinder/userfiles/files/ziminobibapetamafugodugi.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/501d38f973e2463d8851cd1e1fe0d85d/dusofozuk.pdf
    • http://virtualcharityevents.com/vce_cake/files/files/vizipenigawunene.pdf
    • http://globalnetworks.de/www.galabau-poscher.de/main/preview/ckfinder/userfiles/files/fogunadojumikenowekiva.pdf
    • https://mahanakhon.pacedev.com/ckupload/files/65560533201.pdf
    • http://heninrealty.com/userfiles/files/32151983742.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdec.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCDEC 16792 bytes
font_01_sfnt_off0000e5fe.bin
e4e8476ef796cb64492f8036619a4952cb93f6db24c73c950c0582d147999d72
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FE 17588 bytes
font_02_sfnt_off00011400.bin
708a9349359ac21c582e3329bb05fbce5451231297472e4ab7308a9bafaac51e
pdf-font-stream PDF embedded font (sfnt) at offset 0x11400 10464 bytes