Malicious PDF — malware analysis report

Static analysis result for SHA-256 569a4e119cd0fd4c…

MALICIOUS

PDF

80.4 KB Created: 2021-09-06 19:37:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2e2ebfd2db2e07c56f762ca4513f427c SHA-1: bd968ded2e3f5a62e7709742d0e1b9c0f18741d0 SHA-256: 569a4e119cd0fd4c575b21431ab87129518b8d8948bb35b785c5849b5a679301
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 high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs that point to potentially compromised websites or disposable hosting. Some of these URLs are hosted on compromised CMS upload directories, suggesting an attempt to leverage legitimate-looking infrastructure for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://annassteen.com/ckfinder/userfiles/files/10029968684.pdf
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/d5e7a0fba2d9c9a67ab819f62b78c5f2/26002012064.pdf
    • http://secureyun.cn/uploadfile/file///2021082100514376.pdf
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/b77dfcf42d5f33d65273bd8132091f9b/42366713103.pdf
    • http://greatwalledmond.com/ckfinder/userfiles/files/38789757728.pdf
    • http://www.rajpuc.pl/pics/file/39593514063.pdf
    • http://restravel.ru/ckfinder/userfiles/files/nedefodaxuwesolokidi.pdf
    • http://jerseybankruptcylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nowogowogobowoz.pdf
    • http://niestachow.pl/data/aktualnosci_imgs/file/furesexudopojixu.pdf
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1607de11fbd95b---gefegurenakulul.pdf
    • https://suthuytinh.com/app/webroot/uploads/files/58761609974.pdf
    • http://interwork.sk/userfiles/file/15056659566.pdf
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/b929db46cd691a9cc906384910663c19/15893554917.pdf
    • https://riondene.ch/img/uploads/file/solidebug.pdf
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608523eb4b74a---tiwuboj.pdf
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/96a081e261553e76f3767e6218be0835/55624048969.pdf
    • https://menu2uplus.com/images/file/29924069489.pdf
    • http://clarksville.net/wysiwygfiles/file/65951773387.pdf
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/30b1e0ac3588d82e93f308c541abc864/pesumanomexawamopezevukif.pdf
    • https://immobilgold.com/file/85805753782.pdf
    • https://banderlogclub.ru/Files/file/vizigopaguki.pdf
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160b090f88bad8---xizubak.pdf
    • https://cplastik.cz/data/cms/file/xuxabaruru.pdf
    • https://www.tratedu.net/ssss2018/assets/143ad273/ckfinder/core/connector/php/upload/userfiles/files/e3604cdd09390d06787c961d22f55437.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=icds+construction+contracts+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_off0000d683.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD683 16792 bytes
font_01_sfnt_off0000ee9a.bin
91d3da62a18a470566f66b9ae9ba4a7273bf521a9e1c1a821ba37e9a7a3907eb
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9A 10484 bytes
font_02_sfnt_off0001068c.bin
53dbe806a0e0e2bcd064a169e3a651e00ca220cc4dc90064d9b9007d8b85827f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1068C 17384 bytes