Malicious PDF — malware analysis report

Static analysis result for SHA-256 2941ddcbfd718c00…

MALICIOUS

PDF

85.2 KB Created: 2021-07-03 12:14:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 87821c3a4a4201493d1216ae39aa88bd SHA-1: 4a629661f7d8479484d9d23c99540d3309c2f5dd SHA-256: 2941ddcbfd718c002666986a53135731a63d4264dd3bd91e41b7d9525ea55c14
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://bobiniauto.com/userfiles/file/42349828244.pdf In PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/d2fg5ki3q264ddj677rnog9a6g/66790917193.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/firenuze.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160c32c9d356e9---93029371632.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/160847d1aa5d33---felifopepogojegolonekuf.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c32e70d1f4d---91184102842.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16088ec8d05e31---xuxezaraxokawudimevijo.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/e0eb1e249e5a39d9ae42fa4199207a06/81199286130.pdfIn PDF document text
    • http://tourhong.com/FileData/ckfinder/files/20210624_DFC1B583FDCBC2DC.pdfIn PDF document text
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/29c5e339a0363953e6bd2b368d823314/67010635161.pdfIn PDF document text
    • https://beatmuellerfoto.ch/userfiles/files/87059823026.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/fudedova.pdfIn PDF document text
    • http://studio5r.com/userfiles/files/83391714073.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/6ef051da21b5e43c2a2a582bf9e4ef4f/23488671337.pdfIn PDF document text
    • http://artospace.com/pics/file/81801214862.pdfIn PDF document text
    • http://aliguoriarchitetto.eu/userfiles/files/rakijuz.pdfIn PDF document text
    • http://evevoyance.fr/adh/.-/file/6229331484.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1608029cab5162---jolesuzanoxuwi.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/e683f4d3c0e89a7fae42a4b8e3a54079/lured.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/zisokusaz.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/g9epd77dc48lb8vcqbchht0af7/50293867450.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094cb1811796---81523247197.pdfIn PDF document text
    • http://henri-ruch.ch/doc_pub/file/96350413933.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/64a8a60bde3a40f99f2e3c9e7089d996/gegokupof.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/79845596e6dd2ee93ebde0e7b178555b/tumatemarowanopolidoki.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/u7puoqu2ag188nhse60d0p9sd1/tunipesilemeguso.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+do+a+burnout+in+a+manual+awdPDF 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_off0000ea89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA89 16668 bytes
SHA-256: ac877fcdb2c3c49ef04a8fa73823e1373717500d3ff280d4ca74e8f1559e86b0
font_01_sfnt_off000115e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E00 10424 bytes
SHA-256: e707f57c35ca941f0831c812c889c8bccdbb7af25567df8942acdd1408528266

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