Malicious PDF — malware analysis report

Static analysis result for SHA-256 270fec64b74bd10a…

MALICIOUS

PDF

92.7 KB Created: 2021-04-06 08:56:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 08f751d92afe1b497b23a1fdb59174a4 SHA-1: 33ae38c86b35fb6e16e43e8fde058ce37d1dfc5e SHA-256: 270fec64b74bd10aa145f5614cfccdb89b6db6427cf88312a65be3d8b230b024
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, indicative of a link farm or phishing attempt, and uses urgency lures. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs point towards a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://mezovuduw.ru/award?keyword=able+to+extract+pdf+converter+apk PDF link annotation
    • https://gojajegu.weebly.com/uploads/1/3/6/0/136050346/8895d8b5432d7a4.pdfIn PDF document text
    • http://gofadivus.mygamesonline.org/89976921126.pdfIn PDF document text
    • http://mnogolidov.xyz/elantra_hd_service_manualn33o8.pdfIn PDF document text
    • http://budokudepa.scienceontheweb.net/hey_soul_sister_ukulele_easy.pdfIn PDF document text
    • https://vowevabejera.weebly.com/uploads/1/3/0/7/130775986/geberudajuxe.pdfIn PDF document text
    • https://gubagomokugexat.weebly.com/uploads/1/3/3/9/133988684/28914a306aafe4.pdfIn PDF document text
    • http://rolivazugatar.scienceontheweb.net/96564270200.pdfIn PDF document text
    • http://my-favshop.online/78932135878uwlgf.pdfIn PDF document text
    • https://sefubokadizafa.weebly.com/uploads/1/3/4/8/134880044/mumafovewiveji.pdfIn PDF document text
    • https://komiwafaka.weebly.com/uploads/1/3/2/7/132712661/e2fe4711e.pdfIn PDF document text
    • https://balolenitazir.weebly.com/uploads/1/3/1/0/131071159/tajexuzemag.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://84d51d8d-5932-465a-b044-5d36dace581c.filesusr.com/ugd/98e2de_bea9f9903e18402f8ee6e3895bc0c8f4.pdf?index=trueIn PDF document text
    • http://gixarewujedel.atwebpages.com/egyptian_arabic.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/firefox_esr_52._9_windows.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/vagoxusot.pdfIn PDF document text
    • https://d5cf7a15-73c9-49c9-ad57-d4f0303abb0c.filesusr.com/ugd/0d002d_7e429202fab3458b97295713e095f508.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gagotaniwipure/lagumi.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/synonyms_exercises_advanced.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F0 6384 bytes
SHA-256: e816f2c564f2bbd11707961c6ae9cb19adfa71c373602b31321d8ba4ae07f816
font_01_sfnt_off000107a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A7 5032 bytes
SHA-256: d48ca31c66502ddc37c11286106a59e313890b659bc418037b93ffbdad0de10a
font_02_sfnt_off000118d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118D8 11892 bytes
SHA-256: 8157150e506917b247d34fb98dbfd4336b73821cb14dc21dd8db6395ec1fbb11
font_03_sfnt_off000141b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141B0 16228 bytes
SHA-256: 30af27456808018a98c6836e586985fc0ddef3d8448ae34c3a9d1a45745200f4
font_04_sfnt_off000156fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156FD 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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