Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2eb78897de87d96…

MALICIOUS

PDF

96.6 KB Created: 2021-08-17 07:36:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 549f9fbcc6fec2f9cf3f1c1379249f9b SHA-1: 68cbe90f8fc025e824b40c2c463497d5c12d7941 SHA-256: f2eb78897de87d96cff78efb985b4a595b730ba25d22f0a9c78e53e052c38a6d
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised CMS platforms. These links are likely intended to lure users into phishing scams or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://a2designbg.com/userfiles/file/sogubovirulozonamapo.pdf In PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f90ff570164---44542013970.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1606c90894c467---nuzaxobenopomugiwifuxogu.pdfIn PDF document text
    • https://www.rapn.ru/ckfinder/userfiles/files/wodewofutovisaluliz.pdfIn PDF document text
    • http://lamekatus.com/uploads/ckeditor/files/82272960001.pdfIn PDF document text
    • https://hamasataccessories.com/userfiles/files/kovagopezosa.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607843c3639d0---xuviziwolosimufukoxo.pdfIn PDF document text
    • https://aashianarealty.com/file/demafoluminadorevuxa.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/160edd1e54385c---wonuj.pdfIn PDF document text
    • https://pediatricpotentialsnj.com/PP/PPpng/files/jipakunakizewurixonofig.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/57849916052.pdfIn PDF document text
    • http://tuvanthanhlapcongty.biz/upload/ck/files/77688635394.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/47032839710.pdfIn PDF document text
    • http://henrycrawfordreunion.com/clients/1/19/1929e20d1ffebcad6d8b2a659e9c170d/File/23784692344.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/9706483c6f5e1ab99ffdbd983d0199c2/24473997553.pdfIn PDF document text
    • http://igabana.com/upfolder/e/files/20210724141553.pdfIn PDF document text
    • https://corghialberti.it/file/roreve.pdfIn PDF document text
    • https://sp-pir.ru/wp-content/plugins/super-forms/uploads/php/files/8d2664d2ad197ad128c559906d0de65b/42034451762.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6de9d8b120---73161699485.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d34882a3e5---44854553188.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160777220659d1---42697307211.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbc7040de1---91738164001.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/u4ia9ua11cbm320535a85l44mn/88311421258.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/vefomolupazuxazifox.pdfIn PDF document text
    • http://bhs-class1957.com/clients/35434/File/bezenalifetelajomasikoxa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=metodo+cpm+y+pert+ejercicios+resueltosPDF link annotation
    • 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_off0001110e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1110E 10744 bytes
SHA-256: 1362d7f3e81cbd5f71ee484a15efbd83140e813637fee8547c18dd6e31370cee
font_01_sfnt_off000129ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129BA 19324 bytes
SHA-256: fc5264b587ea0abb8f7ffd4714ba9801de7aacc9facb732aa971d44329081807
font_02_sfnt_off00015b11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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