Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba38a4760428ed27…

MALICIOUS

PDF

85.1 KB Created: 2021-07-02 05:01:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 94def0e2012198e21661ac5f1817bfdd SHA-1: aa6e8d3d892f5916fb3841e5e5002dba76724256 SHA-256: ba38a4760428ed27c3cc586fc0d810fd77198f051f432bf8025a2610052aa477
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous links to external websites, many of which appear to be part of a link farm hosted on compromised or disposable domains. The presence of these links suggests the document's primary purpose is to redirect users to potentially malicious sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://smidgel.ru/uplcv?utm_term=how+to+change+profile+picture+on+google
    • http://jmestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kaxixuzinuzepotefuge.pdf
    • https://foulardfotografando.it/file/lovexaxitajorixeximozu.pdf
    • http://zzliuxue.com/upfile/file///zigalerig.pdf
    • http://2478.ru/admin/ckfinder/userfiles/files/40022484249.pdf
    • https://krassimirtaskov.com/userfiles/files/jeruka.pdf
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4b6aaccbe9---5870695789.pdf
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ab5f5fcac98---58710751091.pdf
    • https://abe-rdc.com/userfiles/file/46792328516.pdf
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160dce8d571f96---fasoleno.pdf
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608eac74c326c---35837286774.pdf
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/d26f6c2340bd411987bd7d78ca43c549/74166616825.pdf
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/5e7356f0448eb68f7647c1bf55bd2652/lisasaku.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/44a78fb4469a77a2a41143b051bf8321/53736788001.pdf
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab8d7a9fa7e---ferutejalofumavuwukukogez.pdf
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/cd974523f5a65d7bba31be2bfc4acef7/fevotenerowalox.pdf
    • http://canevinclassof70.com/clients/6/6b/6b8b8ee0d314e59372afbcb75100d768/File/36727974228.pdf
    • http://sun-eko.eu/files/file/mixopujisapipageniwobef.pdf
    • https://parokisantolukas.org/Uploads/userfiles/files/nupogevilof.pdf
    • https://swagath.co/new/ckfinder/userfiles/files/40940151474.pdf
    • https://sealskinz.ru/files/file/wenuzagaxotuwuseguwegiwov.pdf
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/66a4d0dffc7a16f1b6a0647e09822052/zaxuwakagalapumivewiwe.pdf
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3e50582ae0---kumikisunawu.pdf
    • http://petukmahaaaraj.com/userfiles/file/zubitewosixedapabilofur.pdf
    • 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_off0000e769.bin
47621e868fbaacb625cd6e414745c7b715711e40d6b3c294af1467c664b0c4dc
pdf-font-stream PDF embedded font (sfnt) at offset 0xE769 17332 bytes
font_01_sfnt_off00011490.bin
aecc5fa84561c11091fe4724c330e21ced82704d07e58fa42154dd682d9c2763
pdf-font-stream PDF embedded font (sfnt) at offset 0x11490 10768 bytes
font_02_sfnt_off00012d4e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D4E 16792 bytes