Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb69d06255d999b5…

MALICIOUS

PDF

90.4 KB Created: 2021-08-25 05:18:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 69665f017dcbc076f8f70bba86e6160f SHA-1: 745a9ef8a3a73521c4b059733dd5b1c6d1a8124f SHA-256: eb69d06255d999b58f11d8ab24ec22d05f3b9795db8a6422a4b3c0bceee34182
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document's purpose is to act as a link farm, likely to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://infrive.ru/uplcv?utm_term=snow+white+with+the+red+hair+season+3+episode+1 PDF link annotation
    • http://al-bandak.com/userfiles/file/78766877087.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/4bbd6e75a8830bf1ac5d4353be3582f4/39928182413.pdfIn PDF document text
    • http://abwlargo.com/uploads/files/nubugirenoxuw.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/58dce09ece6e6a9888b93eed38429b5d/68244493244.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/getoluzupunoboponifudir.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/sat58c0ukj5vr177h6o6ltfiq1/supigozawa.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e8e60f4ca---moruvenulewupa.pdfIn PDF document text
    • http://kayapaliinsaat.net/file/93546690768.pdfIn PDF document text
    • http://wang023spa.com/userfiles/202108file/2021081218172770554.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/50249505485.pdfIn PDF document text
    • https://charterfori.ir/basefile/charterforiir/files/67227022281.pdfIn PDF document text
    • http://dtcguild.org/clients/80367/File/dibifepibiwemitefus.pdfIn PDF document text
    • https://gamepinleri.com/calisma2/files/uploads/zoxemanim.pdfIn PDF document text
    • https://408of53crownstreet.com/assets/media/files/46558224093.pdfIn PDF document text
    • http://dungcucaytrong.com/images/files/13606423080.pdfIn PDF document text
    • http://dichvuhangngay.vn/uploads/image/files/rulinevonikofisenipe.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/2ef4946beea3821ffd57a6edf620a7a0/31113163704.pdfIn PDF document text
    • https://argumentua.com/i/file/perupigozodametunone.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/0460d226bbc4ed00c0370eecff8a8db9/guwavukiwosugijazapoxag.pdfIn PDF document text
    • http://luisacortesearchitetto.it/userfiles/files/69097396003.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/c1e138a9d0f1a2f370c5a98dceb9b357/75914539993.pdfIn PDF document text
    • http://www.gdchgs.com/admin/img/files/1722533204.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
font_00_sfnt_off0000e6d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D7 10828 bytes
SHA-256: f943523c7ac5213977291af2562e1bd30818b950cb4aa89a1fcbbce47f1c5d7f
font_01_sfnt_off0000ffdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDF 16696 bytes
SHA-256: c4ffb756eece6a5721c53123afa80207f23d58bb4a201c58f3cf0e8ccf638383
font_02_sfnt_off000116b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00012ecb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ECB 16852 bytes
SHA-256: d4c74643dd4d5812bde398c54ccd11a3de2aff46bb83580778cefc90a47461d7

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