Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d197c14b9d787c6…

MALICIOUS

PDF

100.3 KB Created: 2021-08-14 19:45:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: bcf10061daec361ac62062f55760712c SHA-1: e5878b8e821fd9e5f7b7acfccfcebd9861fddaf5 SHA-256: 9d197c14b9d787c6dbffbcf1872eb32befe21209c66044e3d25d00d4d036a41d
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous embedded URLs that point to compromised websites and potentially malicious PDF files. The primary goal appears to be directing users to external, untrusted resources, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://irlanc.ru/uplcv?utm_term=ulead+video+studio+7+se+vcd PDF link annotation
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16079781387439---46968361368.pdfIn PDF document text
    • http://ellev.fr/upload/files/feton.pdfIn PDF document text
    • https://lesfeesdelhetre.fr/upload/files/banux.pdfIn PDF document text
    • https://pcparts.fr/ckfinder/userfiles/files/dokega.pdfIn PDF document text
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/4600693d1e87580134393db6e4add51a/mifewaxalewuvunonebafede.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160c15c9f60940---8625503005.pdfIn PDF document text
    • http://elandtour.com/FileData/ckfinder/files/20210803_DB5692150CAAE9B9.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/161112542f3613---55573478441.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/48507143355.pdfIn PDF document text
    • http://cameragiaminh.com/upload/files/98111633911.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16104578fb8c09---59625743790.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/028fc6a0d5367b7b7c475d2b5afaff95/27357169358.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/76e560d8c1a370df913f3fce6d804eec/82902110653.pdfIn PDF document text
    • https://tsydesign.com/userfiles/jws/files/69251620070.pdfIn PDF document text
    • https://bouveau-consulting.com/userfiles/file/siduwanewezidokesowa.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160e3cd18913d6---50273510146.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/7b9194d29dfb03544ec5b997eaae8c09/92383007836.pdfIn PDF document text
    • http://bellina.pl/userfiles/file/74682784431.pdfIn PDF document text
    • http://realestatespoznan.com/uploads/82417777142.pdfIn PDF document text
    • https://najlepsze-w-polsce.pl/uploads/97770661326.pdfIn PDF document text
    • https://fzclicks.com/demo/files/editor/file/75510280703.pdfIn PDF document text
    • http://jts-electrical.co.uk/ckfinder/userfiles/files/83630558534.pdfIn PDF document text
    • http://huzatfokozo.hu/editor_up/wuniragamorekivumuxifap.pdfIn PDF document text
    • http://presssimayeshahr.ir/pic/file/josuvoxefanomopolusum.pdfIn PDF document text
    • http://micronforgacsolo.hu/UserFiles/file/fudanegesokudetewoz.pdfIn PDF document text
    • 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_off0001205e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1205E 10380 bytes
SHA-256: 68958f14d82788f4692ba705b66e87f9d1d4772dafe5ce60376c072b7ca97319
font_01_sfnt_off0001380d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1380D 19764 bytes
SHA-256: 6d92d7db14adec789fa021567b56e8a2654c2492e4d031dd3a6cfa67d41ad121
font_02_sfnt_off000169d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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