Malicious PDF — malware analysis report

Static analysis result for SHA-256 30f1c5bf34d8f9c5…

MALICIOUS

PDF

97.5 KB Created: 2021-07-03 06:51:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 597c1906c20fd0e645f78fa302cc36e6 SHA-1: 1cc4b01d5d13ededeb10ada00ebaa71f423b95a1 SHA-256: 30f1c5bf34d8f9c5c7d5fb8c3074211dcda54e7138e76e3687e3d80eb3bcdacf
156 Risk Score

Malware Insights

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

The PDF document contains a link farm, with many URLs pointing to compromised CMS uploads and disposable hosting domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are consistent with a malicious PDF designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dbmotorbrokers.com/userfiles/file/66128885879.pdf
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16088b62c0c7af---xebatubidujenogevofudimu.pdf
    • http://voszveszprem.hu/_user/file/tejazozadasatexate.pdf
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160d529c0a6bf8---silepivupevedaj.pdf
    • http://humanlitech.com/files/files/vonibi.pdf
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/355780f14f9de6b70668927f39258ed6/38792804939.pdf
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086b56a10ff0---tupedivulobabowatujik.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087d221bbb1d---serojugu.pdf
    • http://fzcce.com/aimgs/uload/files/94412907316.pdf
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16096da9a48129---30627343297.pdf
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/63e8617da83eb3065de25f6c066a88ed/noxifafekudono.pdf
    • http://fruitvita.com/files/files/80831164391.pdf
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/78c48057481e0831f33c10721f4dd9ee/9896144353.pdf
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/bqp9d19s6qnout1u581jbe15ul/munikopojodumazef.pdf
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/0b98b0b2a2c1b89b0e8ad69c879bb0e4/vodafunedikobogozixu.pdf
    • http://ore-processing.ru/d/files/zabobinatezed.pdf
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607775435c76c---nusevevalakukiru.pdf
    • http://ytbozhuo.com/upload/file/051426529076.pdf
    • https://megalightgroup.lv/uploads/files/tekolejo.pdf
    • http://pantryscan.com/123cars/imagefck/file/71102988722.pdf
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/de3deed004dd9fecb1da22c84cc248e9/velezukosejale.pdf
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/f35tsfb7ilhc9lms31rcl4kfva/80122699811.pdf
    • https://zebcom.in/userfiles/file/dilipadesako.pdf
    • http://ksnjl.com/userfiles/files/sajurolaxotemunetax.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=i+know+my+redeemer+lives+job
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010112.bin
807006794825817d9c94874b4b85034bff16ce70b4b27a7be9eb73743b2e379b
pdf-font-stream PDF embedded font (sfnt) at offset 0x10112 16844 bytes
font_01_sfnt_off00012cdb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12CDB 16792 bytes
font_02_sfnt_off000144f2.bin
d583f9a1fe6a6252074fbe4b028903b4eb75627e927d1491c3146d2812d48c65
pdf-font-stream PDF embedded font (sfnt) at offset 0x144F2 10728 bytes
font_03_sfnt_off00015d86.bin
2f983471a76d77e87e02f560769a0c7335593d2c6378f91973467b046bf44014
pdf-font-stream PDF embedded font (sfnt) at offset 0x15D86 17076 bytes