Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b69bfa14614c1f8…

MALICIOUS

PDF

85.0 KB Created: 2021-07-27 05:15:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8af030eea4cf236acf44d9c4488d9e9f SHA-1: 64973ab976b0a6126885a0f37e94d444db791484 SHA-256: 5b69bfa14614c1f8bfb818fc8d4f30d9eb2eb6201b0b9103a47213729eb8fe02
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating it is a link farm hosted on compromised WordPress sites. The ML classifier also flagged this PDF as malicious. While no scripts were extracted, the presence of numerous links to potentially malicious or phishing content suggests an attempt to redirect the user to a harmful destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

Heuristics 5

  • 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://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607777ea8e88f---10952906472.pdf In PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/39160cdfbe991a01ec22476a0d15a80d/zimobekexejulivaxud.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/c0d2d614687857e7e06ff871e1d1f182/rexexosifegoxulawi.pdfIn PDF document text
    • https://eqonetech.com/upload/userfiles/files/julaf.pdfIn PDF document text
    • https://hoangphatdanang.com/uploads/image/files/27464889382.pdfIn PDF document text
    • http://petraifevronii.ru/ckfinder/userfiles/files/tijububibenamirajolij.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608878178080b---7219799227.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ae042ac0d6d---vijegeboxokolozazerivale.pdfIn PDF document text
    • http://huijingweb.com/upload_fck/file/2021-7-7/20210707015254448630.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/bfufehnls4cuq65v9v27mbnj4o/90231771877.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a97f3818e0a---joxigabobogonojexeginem.pdfIn PDF document text
    • https://digireg.se/upload/41315190127.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/bc33dad1ed6db61ca6e12dd672d608b2/revoxitiba.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a23e8778652---gifutidanipe.pdfIn PDF document text
    • http://www.scea.edu.mn/ckfinder/userfiles/files/pibatow.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/luwiriwebekewako.pdfIn PDF document text
    • https://olivierdaulte.com/ckfinder/userfiles/files/lemeruke.pdfIn PDF document text
    • http://logisticsnetworks.net/ckfinder/userfiles/files/mafunamatuxapale.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/57636133a095a75a00867c6e2fb3f388/12965486869.pdfIn PDF document text
    • https://mattress-leader.com/media/68105185868.pdfIn PDF document text
    • http://przychodnia-felinskiego.pl/uploads/editor/file/mobuvagawedulabulukojerim.pdfIn PDF document text
    • https://nepalimodelagency.com/userfiles/file/kipoka.pdfIn PDF document text
    • https://majubesar.info/contents//files/9557869091.pdfIn PDF document text
    • http://autoscuolavalerio.it/userfiles/files/10458339746.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/2e401793269c4f3d69ab0fa42c37b945/74503956564.pdfIn PDF document text
    • https://naucharts.com/ckfinder/userfiles/files/paxumun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=gba+online+emulator+iosPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE982 10548 bytes
SHA-256: dd1e22a2a15356e7564eab070b24e9a83badec531fc432723953fdf746b1e108
font_01_sfnt_off00010188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10188 17400 bytes
SHA-256: 68f43fb2da39b47b3c90180387e0669a7e15aeb52d4bd0b463d24431eb9b9712
font_02_sfnt_off00012ef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.