Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d368cf7aa3274ae…

MALICIOUS

PDF

110.8 KB Created: 2021-06-25 19:53:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6532ba24b5fd0b33fe7e338f30ea8b9b SHA-1: 960be15e1afbb30fa685032379bab53139f176db SHA-256: 6d368cf7aa3274ae9981d353c051e9f20aec56f5db8f73f5c679ee4cec3c35fd
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model indicated a high probability of maliciousness. The document contains a link farm with numerous URLs hosted on compromised WordPress sites, suggesting an attempt to direct users to malicious content. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9698

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 http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/0f25ebeb8437de0b9ed5c3e7593c938c/kuwukexiwabezirefa.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607479057d5dd---4941848995.pdf
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/2ccd6npv827mldeiti18dl50j0/35940514291.pdf
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c91d5e84b6---reluvatafe.pdf
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/a30b4f7f5ee3c668c79cc4e11f003383/6730255056.pdf
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ccaaeac64b---mowidibesolesezepire.pdf
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/2ee49a4909ba6b7de362c2cfd614a46e/podajap.pdf
    • http://akinmedikal.com/uploads/file/javono.pdf
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/16083b0e3f2f17---daxaxamizu.pdf
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160c1bcc08d757---vafunesozitofuxofenuje.pdf
    • http://fullx.net/files/widotukesomapurufosiwuzup.pdf
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c66835a358---68323434842.pdf
    • http://ottotech.center/userfiles/file/7198156386.pdf
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/k7jbji4vqj23ovum988nccvqhl/48386497347.pdf
    • http://zulaikhatextile.com/userfiles/files/xobinunimubivininedefome.pdf
    • http://bumsnab.ru/uploads/files/69524140678.pdf
    • http://aaaexpressheating.com/userfiles/file/32278512184.pdf
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8509ec9833---weraxogesariwodusabigimav.pdf
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9b9a53516e---bokoxubasav.pdf
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16090f2198f8f8---wewabag.pdf
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/1q8kctt9aj6kkt5tqu2ke7lbs5/58069127185.pdf
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160772d48a915d---bilozutogopomomorunuzo.pdf
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/96408301f9d22c53b582b732dfd02925/60396505107.pdf
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608408b4767a8---50754666838.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=star+wars+emojis+android
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011be3.bin
18a24bdd3a474ff23de64fe31f833b7717c948156bd1bfb98ce15a0fe8cf6b30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE3 22292 bytes
font_01_sfnt_off000153d5.bin
0d4bf95d24a6cf33e1fe041f5fd105f66f5b0efde6c0b56d1f349135d983fb8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x153D5 2456 bytes
font_02_sfnt_off00015e4c.bin
c4ccefc1f48a89b672286e82dd3b5a74b6e4dd7b3831dd105f8b5a14aeac7c33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15E4C 10652 bytes
font_03_sfnt_off000176ad.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x176AD 16792 bytes
font_04_sfnt_off00018ebe.bin
c534b30a2bb03acd9ea4e0fbd9f65b808519b4fbb0f46fe9b2b852d4ef2760bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18EBE 17996 bytes

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