Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b266a231093a2b4…

MALICIOUS

PDF

84.9 KB Created: 2021-07-05 03:43:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d1d11e49bbb990c5a7a81df0721ca631 SHA-1: a9384fb4038749ff32b897cdc8e93593bb17749c SHA-256: 9b266a231093a2b4cf8bebb56c30f03a1a70be142ab1dc91c2363790b09aa85c
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, likely intended to host phishing content or further malicious payloads. The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF_URI heuristic specifically highlights a URL that appears to be a redirector, suggesting an attempt to obscure the final destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://catamma.ru/uplcv?utm_term=gloomy+meaning+in+marathi PDF link annotation
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160c5690fdbb7f---munokezapi.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ef7a76f7e2---lirupebi.pdfIn PDF document text
    • https://blokhol.com/upload/files/56398808000.pdfIn PDF document text
    • http://architettodrabeni.it/userfiles/files/wokajozim.pdfIn PDF document text
    • http://tachikawa-derma.biz/ckfinder/userfiles/files/84831776774.pdfIn PDF document text
    • http://www.verneteco.com/ckfinder/userfiles/files/93319467589.pdfIn PDF document text
    • http://learningkey.org/userfiles/94955932291.pdfIn PDF document text
    • https://mfdesign.hu/files/file/13818169862.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/47339o5n7i9p306sph6a5e35dk/nutikowogokutuzapukawul.pdfIn PDF document text
    • https://mimpishio2.net/contents//files/padivatanabevejumijaf.pdfIn PDF document text
    • http://tea-ra.com/user_data/upload/save_image/files/tapuji.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160aaf711b00b7---40622137843.pdfIn PDF document text
    • https://trimix.bg/UserFiles/File/18152222555.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/c192971504c8263523e6a2e1b4e508d2/tadik.pdfIn PDF document text
    • http://donaldbermanmaimonidesgolf2020.com/clients/0/0d/0d43fbb8ff91cab41fa1b056c0d912a9/File/77851331450.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d9594eba026fe4a6e931a272b53a72b3/nivozapizuwebimet.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/f7b5d245ebbe7bcfd21cfc2fa48cfdac/pedubenavuwepakedekute.pdfIn PDF document text
    • https://thegioidongphuc.net/ckfinder/userfiles/files/50756076082.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e4a6310c6---22592023673.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d74dc0aa1c3---vifovokeritu.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d66cb7cc009---lidomekokup.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/6549a6b358e24d6c3d4453693873a4cf/52203444088.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/7d0ntv4aqh1is5icmjubmph0hn/kisevogenawawu.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/2494a09206062dde479cb39dd078e926/51372639835.pdfIn PDF document text
    • http://muskogeeroughers1967.com/clients/9/98/9899c641331876fb313f08ec475a0443/File/tevupofebowikuji.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000ee22.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xEE22 21984 bytes
SHA-256: 0acb561eda379704a2d10df8d62b331dabdd267cb2a453508885682b71067c67
font_00_sfnt_off0000c5da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5DA 15756 bytes
SHA-256: 8653c7c292d54dcd88ef4aee0cd7ef68243ccc7066ca9f69aaca5e22a49dca1a
font_02_sfnt_off000113ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00012c03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C03 10540 bytes
SHA-256: bcb1308807978f1a8f24c5030a543eebad0e1e2d3d0015455cfc8b518d33c000

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