Malicious PDF — malware analysis report

Static analysis result for SHA-256 b63ebb96a519a002…

MALICIOUS

PDF

98.3 KB Created: 2021-03-18 21:43:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 43f8d607bbaecad04d2e802b5e1c850c SHA-1: 26d25cded4951c4a040cb5d892e2a4c5505643bf SHA-256: b63ebb96a519a002f1827dbc8e07cc1d6319c49bae762e977d0ef2dbeb9afeb2
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pelibifir.ru/wix?keyword=tap+titans+2+apkpure PDF link annotation
    • http://chelamela.org/hide_and_seek_2019aeg5l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475866/normal_600a10a4c938c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486346/normal_602b8ed80fd4f.pdfIn PDF document text
    • http://p-kavkaza.ru/tufimavipewuxulukagovanwmub.pdfIn PDF document text
    • http://scrlt.xyz/m-audio_fast_track_pro_usb_drivers_windows_7iy38t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482426/normal_6016ace56370d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/kuratuvizof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a67deb6b-30c3-40d1-9c09-3d6ff951722d/homemade_easy_dessert_recipes_with_few_ingredients.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/cavalleria_rusticana_giovanni_verga.pdfIn PDF document text
    • https://s3.amazonaws.com/nevowimo/consumer_reports_dishwasher_reviews_2018.pdfIn PDF document text
    • https://8650d040-a33d-467d-a608-6706f181f11b.filesusr.com/ugd/61b8bf_230b425950c24ea492558601feb59a3a.pdf?index=trueIn PDF document text
    • https://19972ee8-34f0-4900-8009-9f590161cd02.filesusr.com/ugd/64db51_e10a2755a88c47aebd0d85a9439e8f6a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/rizudufanamejaludid.pdfIn PDF document text
    • https://8ac5c8e1-9174-427d-95c2-90bebb9f105a.filesusr.com/ugd/44b221_7dd1b02d108b499d94c1b75a9214161b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/415f4760-53bc-4f4f-8c18-8f80748fc27e/61600128974.pdfIn PDF document text
    • https://51364a6b-283d-4537-b9df-48522fd8faf2.filesusr.com/ugd/921180_8fbad35ccb194b11980eef08b3ad2cc1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/425f25f6-0603-4f12-9017-aa2ba2317459/42546281800.pdfIn PDF document text
    • https://36c7e617-1221-4173-b726-d5bce2878801.filesusr.com/ugd/610d21_99889ce1ae9f439e912bbceec6c8ee17.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/sipamomefemadutetojata.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/458f8fff-4b9b-4722-a285-c87d13cf9258/marajebabo.pdfIn PDF document text
    • https://61090d85-22e6-4724-b969-52a17785150c.filesusr.com/ugd/952c2e_dc10d152b0a14cc08160192837bbbb1a.pdf?index=trueIn PDF document text
    • https://8aa13d94-a051-4bfa-911d-5e7c2f772018.filesusr.com/ugd/382cc4_50598370be0f45f580170092c4272295.pdf?index=trueIn PDF document text
    • https://7fe1f042-206b-4735-a408-f56337efeeb4.filesusr.com/ugd/d34b51_c4db42d88f25413690cb83b62d3f4888.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn 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_off000111b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111B8 4928 bytes
SHA-256: aee61d4724de8223062a968ae403793eca1a0520af6760ff592d25ed836fde22
font_01_sfnt_off00012283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12283 5812 bytes
SHA-256: 9796d260333b2a30f66c52eed5be939c7bac2dc1b823078198267751d1f32516
font_02_sfnt_off0001311c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1311C 16640 bytes
SHA-256: b73df19a171d2272601b91ab61ca0f15d2a740181eb82b0527dc994e42a69b80
font_03_sfnt_off00016405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16405 16128 bytes
SHA-256: 9c8aa07a1129bb79f277e142aaa96fee495b8652b17b985c001cefa97694c198

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