Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd67d99a82cb0427…

MALICIOUS

PDF

85.5 KB Created: 2021-07-06 00:06:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: da12637aa9eda5f4888b3b57310a36ae SHA-1: 0805adffcce8ea9b02d55cc21370bb67495c2b41 SHA-256: fd67d99a82cb04272d7e09fe6b69f8a622e93b281f68d140ab090efbf3b8c872
156 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload storage and disposable hosting. These links likely lead to further malicious content or phishing pages, attempting to trick users into downloading or interacting with malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607075fa44c21---zejameb.pdf
    • http://ahxxzx.com/userfiles/202105/file/lobolelakikit.pdf
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/22833a0c48016bedf8dde792c31e98d4/dojokodepixonosuvasep.pdf
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608f04b62dfed---vofefusigoxupaza.pdf
    • http://agcslohian.com/userfiles/file/guvakamowewuri.pdf
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160877a7747409---fiwifijeboxi.pdf
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/q9ef8m4cltb2hqkne1pr1pfqel/jovenoxeb.pdf
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/5c9d07ebe5766cbab352e332e7d876bf/numawosenukuv.pdf
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/70c0d56df7c407a51c0e0d8084b2e2fa/vogatamum.pdf
    • http://74ahs.com/clients/2/2a/2a132ee8da0778863662fd4b1fa251ed/File/lerimelomuveg.pdf
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/577d6ea800f0f6af890a401574376d61/23180807407.pdf
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c05faf6e884---96527572170.pdf
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/2jtprskscnqi4kua2ai36u42q0/jupenelemezozod.pdf
    • http://shosholoza.de/file/mufetegilir.pdf
    • https://lapalettedesarts.fr/gestion/file/57828655539.pdf
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1fc6e4568d---55166657099.pdf
    • http://andersonlawdecorah.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/40845287981.pdf
    • https://yodobashi-church.com/naruritawobotifefuvewav.pdf
    • http://grimastone.ru/files/ratojofexoxi.pdf
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/d848911b541770c6ed75590bcae2cb05/9543921420.pdf
    • http://shuswapladystriders.ca/userfiles/file/bogoxokapuni.pdf
    • http://brenna-ski.pl/userfiles/file/60322845650.pdf
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/p10h9eo3vl4ppcjakc1vj3r3vd/40479516395.pdf
    • http://aranykoronakft.hu/userfiles/file/guloxinikejufaloviwis.pdf
    • https://np21bellapalermoshopping.it/file/watilikujidito.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=bc700a+scanner+manual
    • 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_off0000ebb0.bin
c13c79b2052777f930c741b6fdbd666346602dea4b3a61233a06843c5a48ede8
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB0 10408 bytes
font_01_sfnt_off00010355.bin
dd063469b36a52317bcff8d6c9842c91f5eef7f49a7af663f5083abc5fa7cf7e
pdf-font-stream PDF embedded font (sfnt) at offset 0x10355 17236 bytes
font_02_sfnt_off0001308e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1308E 16792 bytes