Malicious PDF — malware analysis report

Static analysis result for SHA-256 201ecc57e7ce594c…

MALICIOUS

PDF

88.3 KB Created: 2021-07-04 01:01:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fca9e4188acccdd82d649d590490e102 SHA-1: 9fe9c416ab893b28fced6200699e79ce5ed940ab SHA-256: 201ecc57e7ce594cf3fc8b0fbae8ff852ccec76336c393feec23a9b60cfa8b90
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest an attempt to lure users to external sites for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/qf9vlifd5sbpa22odrcfa2unpa/vubosapa.pdf
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/dn6fki9etd65jolae6fvjraqn7/93953110131.pdf
    • http://sevimticaret.net/userfiles/file/71839460091.pdf
    • https://ktmcollege.org/public_html/userfiles/file/lebutuzabupukeso.pdf
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/tubpmuo2u7ni7edivgmj1i2ro6/jiwafoxud.pdf
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca97a3c730---rupokumazutu.pdf
    • http://techscreening.com/userfiles/files/38758220311.pdf
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/df92d467751b30161e919d0935a259cb/bitawota.pdf
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/xidaz.pdf
    • http://activesolutionelectric.com/images/file/lewasav.pdf
    • https://preciseenergygroup.com/media/82638413146.pdf
    • https://waroproject.com/file/sidizonariwixutovekularev.pdf
    • https://harkakotony.hu/UserFiles/file/73393598640.pdf
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098531abafaf---molif.pdf
    • http://sistersaviopublicschool.com/userfiles/file/68029716561.pdf
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c44bf34053b---nuzoxuduso.pdf
    • https://nhatngudongkinh.com/upload/ckupload/files/sogufexujoju.pdf
    • http://www.johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/tisisozejevojonekufepimul.pdf
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abdc6db9335---66323474921.pdf
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/ad5c412d0f06ea5aa524dfcf006535bf/dokefewagugawisa.pdf
    • https://5uempat.com/contents//files/84843514842.pdf
    • http://challendor.com/fckeditor/upload/file/44031525119.pdf
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16075bb8d9a09f---11310528225.pdf
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d70e98db128---38085861522.pdf
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/h48al77dujugn6rmndkc6gi438/bevolisasuguga.pdf
    • http://pvhs1967.com/clients/a/aa/aa78cb05297cd93d8a9ab6bd1eb8a3c4/File/75914397089.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=the+rules+of+attraction+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_off0000f4d1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D1 16792 bytes
font_01_sfnt_off00010ce3.bin
e892535f7d11a8f4815b8e50dd3b0970d6e8114522e853d134de72a46b7e2912
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE3 17660 bytes
font_02_sfnt_off00013b0d.bin
466a011dd12f614f8e3c0af09ae6da1e0883190b435b56deee9aa585d62d5154
pdf-font-stream PDF embedded font (sfnt) at offset 0x13B0D 10780 bytes