Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b7437cf10e4a7f0…

MALICIOUS

PDF

84.9 KB Created: 2021-07-01 00:46:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8d0a92db6b941929a78f05a87175fe9a SHA-1: 2bca35434a400f8601293ff12473cb7eecca01d0 SHA-256: 7b7437cf10e4a7f0b3043d5d2a6652f3d81eb7a2c2366822c265a06ad09548c9
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

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://slide-bearing.com/d/files/81854404795.pdf
    • http://grodgolf.com/clients/f/fd/fd83fa7079552abb47853a85229f74c1/File/zokomagizalebawa.pdf
    • https://betalinktech.com/blmedia/file/kagujekawazurababijite.pdf
    • https://allmassage.net/upload/file/20210623071449.pdf
    • http://oticonshop.net/ckfinder/userfiles/files/77447661714.pdf
    • http://penzionklara.cz/userfiles/file/7255632381.pdf
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1609cdc7de1378---rotelekatokadawi.pdf
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/1ea55350309e04eb6fc215804c19853b/39161202352.pdf
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/12a92844b0279403650a001621076a48/nosop.pdf
    • http://meruzhankhachatryan.com/app/webroot/files/file/83249275603.pdf
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/h3ojqu50reali8ml90fflq7fkn/saxulavonebusolaxuzibazi.pdf
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093a32a83b26---suvelutevupibojosofezagow.pdf
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff2cd4b7d4---furejerakusugaki.pdf
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f8056c849---favege.pdf
    • https://aadhaarretail.com/administrator/imagetemp/file/foserutasirixaponokig.pdf
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7b08d2113---vudop.pdf
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/41ku54cmnbosekt3ucm7pbned3/mawajunokufeludumerodok.pdf
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/cb79sob3gok9nbf6vnqe46ndn7/35754279464.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d052ce9cb5---zotokemafa.pdf
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16095f1b70636a---57321463152.pdf
    • http://bvsaigonbinhduong.com/uploads/files/begetewijezu.pdf
    • https://menu2uplus.com/images/file/35818177868.pdf
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074accb8f5e8---fasibimobiberowin.pdf
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16082063ca773d---belevemunuzajunevikil.pdf
    • http://autoshiftbid.com/fckeditor/userfiles/file/38793140711.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=mac+not+going+into+recovery+mode
    • 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_off0000e954.bin
d09bfe75c928d654bdeddffa67d3d30cbf23f5fcf435e550c4f681dbe8b80c6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE954 17272 bytes
font_01_sfnt_off0001163c.bin
7a9b4d698e51f0ff7c4a1084ed3c4196d427b1b1ca86010f301e7644d56c16ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1163C 10672 bytes
font_02_sfnt_off00012e8c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E8C 16792 bytes

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