Malicious PDF — malware analysis report

Static analysis result for SHA-256 cae107aa742f650d…

MALICIOUS

PDF

85.5 KB Created: 2021-03-11 20:35:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d5698af086d8025ab9cc28f87aa962f6 SHA-1: 15cb6b4c80763f620e3bc0aeb5851c619fee2e29 SHA-256: cae107aa742f650db1983e93db141d62a5cde944790bc88107ad0ae9d2d44b98
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://dafemum.ru/123?utm_term=mastering+physics+giancoli+pdf PDF link annotation
    • http://granitmetrospecstroy.ru/dipetemagx14d.pdfIn PDF document text
    • http://msertis.xyz/how_to_use_lightweight_fusible_interfacing180zu.pdfIn PDF document text
    • http://shopbest.online/72537815826yog5m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496014/normal_5fd67bff275d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376870/normal_6034196fd31af.pdfIn PDF document text
    • http://znatural.space/tunivifarog3wal6.pdfIn PDF document text
    • http://e-devletodeme.net/bioethics_case_studiesrnw0d.pdfIn PDF document text
    • http://xorelurisadadun.iblogger.org/34980284138.pdfIn PDF document text
    • http://blu-ital.space/sccm_inventoried_software_reportc4qgv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453551/normal_5fe3a0cc12d92.pdfIn PDF document text
    • http://bullbananavannaone.xyz/99813193014u2jn0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456699/normal_5ffaa3188da11.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
    • http://benifolagalat.epizy.com/wimivakubiladevolonoxapot.pdfIn PDF document text
    • https://f039f7e9-c7fa-441d-bf3d-2f0e35d6be10.filesusr.com/ugd/80685d_60c6fb303c02407ca727b626dcad8744.pdf?index=trueIn PDF document text
    • https://50fe66f1-00be-429c-ab6c-57a9f80d6ab9.filesusr.com/ugd/39cb9d_c200e7d9f8c44b5099133e9cb2e2748e.pdf?index=trueIn PDF document text
    • https://6a421494-2577-4416-904f-e17348f56b63.filesusr.com/ugd/85e76a_42599b6691e8449e808c6c0f07d36157.pdf?index=trueIn PDF document text
    • http://xaligapuk.epizy.com/bezuvodirosiwuwusaku.pdfIn PDF document text
    • http://gekikebikujog.rf.gd/jio_whatsapp_app_video_tamil.pdfIn PDF document text
    • https://a0bbd489-bf03-48a0-8e93-88abd0751e5b.filesusr.com/ugd/370ea2_4cd4a1ccd4164813938db419017f1ca6.pdf?index=trueIn PDF document text
    • http://rujetekanag.epizy.com/25194383279.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10489 5312 bytes
SHA-256: be2689e86c193e4a441af36421e865518aefb59eb03f0b0156b5b183888abd79
font_01_sfnt_off00011694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11694 10528 bytes
SHA-256: 38a3c8a1082bc7295d3cac36005da032e1bb3cba6ec9635b2f6ccdd6b7af9a8a
font_02_sfnt_off00013a7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A7B 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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