Malicious PDF — malware analysis report

Static analysis result for SHA-256 72586c0f96eeda75…

MALICIOUS

PDF

103.7 KB Created: 2021-08-06 07:09:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ae4cd1016d1169c50cc3ac0f3612619d SHA-1: e762d3d32a4214ce03704e4eb98e838db4c98b11 SHA-256: 72586c0f96eeda757d537a24eb4f2073ad1f9783db73060fd1226d316adc4d75
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload directories. These links likely lead to further malicious content or phishing pages, aiming to trick users into downloading payloads or revealing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9898

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://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/d01r9751qbt231h3dpge3oh748/58364821271.pdf
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/17efbe1caa14b012274d57a5800f2d93/99751558783.pdf
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a9fff2ea635---48136821637.pdf
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073e8ba9c805---kuzigizoxuwogunatera.pdf
    • http://lycee-elm.org/userfiles/file/41223892075.pdf
    • https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607022822c9d0---wuvubexejokaxiw.pdf
    • http://mobilni-kadernictvi.cz/files/file/deporeluviraxumidavemu.pdf
    • http://galantemontagnana.it/ckfinder/userfiles/files/zasuxa.pdf
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160810f00933bb---54481284443.pdf
    • http://uni-farm.pl/ckfinder/userfiles/files/31645784707.pdf
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/91d8c1082e030b7015cc407fef1bc48d/30965489235.pdf
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/16083553fbfbf7---sakexemogurijununazip.pdf
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/b7e6019bf27dff30dd422a2027ba680c/57440781363.pdf
    • http://mdfgiare.com/upload/files/pewulenuli.pdf
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/4084138b2ae66bcba49e931f9b701b3f/xubewolutosesuxemomi.pdf
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1b8733c14a---zakanigivugojutofi.pdf
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/d0ae2926ea1c2468e96a590cd3401701/80921593688.pdf
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/bcc762617d5633050ae9b1d039d8feb8/watawamumoxodedotulavebom.pdf
    • http://iltorg.ru/upload/file/kumanubusolilukav.pdf
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bcecdfe0af9---65676895392.pdf
    • http://thepducphat.com/upload/files/xuvape.pdf
    • http://fautographie.org/images/userfiles/files/57916177474.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=bollywood+actress+height+5.6
    • http://s292376414.onlinehome.fr/datas/imgmail/file/66897761226.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000119a4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x119A4 16792 bytes
font_01_sfnt_off000131b5.bin
7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x131B5 16312 bytes
font_02_sfnt_off000147c1.bin
6f1b5a564be273c7a7f8fa506b5161814234cc66805d3613570f30d1f9970241
pdf-font-stream PDF embedded font (sfnt) at offset 0x147C1 11168 bytes
font_03_sfnt_off000161f0.bin
bdb29b9b2068e8fec99a5d69410d3de764c12ec9024047d6058cd760e54a6e5d
pdf-font-stream PDF embedded font (sfnt) at offset 0x161F0 17376 bytes