Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f4279f6ba7de579…

MALICIOUS

PDF

101.8 KB Created: 2021-06-28 07:45:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ce1c91afd6b3d0894e3638e2d03893cd SHA-1: 6b4d67fb0615319846167a57ee7be707cae25bc0 SHA-256: 8f4279f6ba7de579448061492c212083c36548605faa694ea1b4a234b4c28e7e
164 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress upload directories, suggesting an attempt to distribute malicious files. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classification strongly indicated maliciousness. The presence of a 'download' button lure further supports a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae7f22ebf1e---gujadeguperuxufim.pdf
    • https://economiadecomunion.net/ckfinder/userfiles/files/kukanabulotibidemow.pdf
    • http://granite1962.com/clients/869125/File/12169700923.pdf
    • https://susta.vn/userfiles/file/779445877.pdf
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/lpq4jo9qu28b6nvamfuhn6iou2/guzemi.pdf
    • https://terryhaas.com/wp-content/plugins/super-forms/uploads/php/files/1c1f4d17c59c32dcfadff8a75b2e5894/bezasiwefabuzukevonax.pdf
    • http://motorlustor.net/userfiles/file/xetefepawufuniz.pdf
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/6957eefac48af821b32e1b36e8547a3c/87747000862.pdf
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/2ebc28e111478bc13413258f1405e485/35991516310.pdf
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609209d41806a---sovovugubamu.pdf
    • http://altinay-law.com/images/file/32196520652.pdf
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4165546909---jebigige.pdf
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/f401fcad312e88c4102f62f174b4a51f/49010770173.pdf
    • http://arlingtonhigh1961.com/clients/e/ef/ef36f0800c0a5d5a0b00d5ecc8c3c6da/File/zanodififuz.pdf
    • http://come2menorca.com/images/file/41614046484.pdf
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160748f03be1fe---dawebirurokisasopuf.pdf
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/ma7p42prt9s3uoa5ifjam69u33/84311548566.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608af593f0723---25482017386.pdf
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/uv9ncnvhqmmitjps8btl6vsse0/76996650740.pdf
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608edf73866d2---63237503099.pdf
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/c64ba8e3083e527b5d384e0fde06a29e/33258494521.pdf
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/mob3g68b9nkf6cre496ajqsfr2/80030029342.pdf
    • http://covinahigh1980.com/clients/1/14/147ee80f0cf2e08ca1b5067d21485a43/File/jobikeloxorabo.pdf
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/bpkvjclbn4ac59bvskgk3li2p9/kokobasuzawuluzafajeke.pdf
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/2642c0622e93c77cb9d53fc623f37df4/7149235664.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=how+to+create+a+tnt+cannon
    • 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_off0001166b.bin
adf38969d40f501586e0caf93d33991e243baeeecfe575c4831cdbf64b7044fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1166B 16336 bytes
font_01_sfnt_off00012c6d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C6D 16792 bytes
font_02_sfnt_off0001447f.bin
f27d1cc4c7d86300bea1db895b9cff334800b86d32c3a91fe11843721c3b7642		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1447F 18212 bytes
font_03_sfnt_off00017303.bin
e136eff6d0e424d79b3d678d1d4e440b4cd8639cc3da71d093219f92f1495d33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17303 9992 bytes

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