Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0332ed3f0c51fa4…

MALICIOUS

PDF

81.4 KB Created: 2021-03-29 14:30:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 161f8cfbba745340875c55930d362ec5 SHA-1: 48ceb5e98af1cb73cfdfe0995760509584a81cfe SHA-256: b0332ed3f0c51fa44a1620e41b36a9bd4c59f83b5ca63e7bc7b6f03cd4c6c49e
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://kuzutuzo.ru/strik?utm_term=what+is+a+spider+computer+lingo PDF link annotation
    • http://zomaragexavope.sportsontheweb.net/16039364556.pdfIn PDF document text
    • https://cdn.sqhk.co/mozedizupi/TgeEhbS/kedafopejikotowixev.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413000/normal_5ff29aa212482.pdfIn PDF document text
    • http://bawazofo.getenjoyment.net/gebugimokexedajawafa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365612/normal_603827294b3bf.pdfIn PDF document text
    • https://cdn.sqhk.co/fagisuxupinu/BihVXhg/zigemufomoterexegizof.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://591379ed-26d0-4405-baa7-5b8dadede013.filesusr.com/ugd/866ffa_6b6213ea26964ea2b4d0bef566309cb1.pdf?index=trueIn PDF document text
    • https://404c0e03-56c4-4888-bb84-d9d32a71a3e4.filesusr.com/ugd/100e2e_5e3264d73b2044fe81568776018f5f01.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sinadi/captain_tsubasa_dream_team_apk_2._0.pdfIn PDF document text
    • https://7e8267f5-6380-480e-ad72-df526eaefc07.filesusr.com/ugd/cbe325_f2fd94808a454783b0ca92c11adae347.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/sulemegowapumodez.pdfIn PDF document text
    • https://dedb376b-efc3-4528-ac10-fc65d12f866c.filesusr.com/ugd/5f6074_1aade248b9154d689af53f4d528ff5d6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ropuba/buku_heavier_than_heaven_bahasa_indonesia.pdfIn PDF document text
    • https://235be7ff-9b22-41de-91df-7a9e5ced5199.filesusr.com/ugd/4fa465_6d370b51a65b4b7a89da6e4c00491f43.pdf?index=trueIn PDF document text
    • https://a8fdb364-3865-4521-a36b-e12f4de7752f.filesusr.com/ugd/e20637_d33ab7c1f0e94de4ac98c10789b270ad.pdf?index=trueIn PDF document text
    • https://d9bc9112-e8db-454b-af0e-45d3b538737f.filesusr.com/ugd/1d3654_31c2acdc087a4c3c80455cd6ba7be61c.pdf?index=trueIn PDF document text
    • https://b564fea6-732e-489f-a029-a72dc6590de2.filesusr.com/ugd/6a4619_52769e1cefd44227af682d27d100cdee.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/2003_jeep_liberty_parts_for_sale.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
    • 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_off0000e40a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE40A 5500 bytes
SHA-256: 97417033adc6caf2ac8211d8dd1f74a31bde03ecd036374b29d68f187a097b85
font_01_sfnt_off0000f69e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69E 11196 bytes
SHA-256: a41b73b8b2e1513130aab479917aea68add551a2379f05ec60fc545f7122092a
font_02_sfnt_off00011d33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D33 17952 bytes
SHA-256: 2736a9e9f22e9f4b32701d3eac117c1c8238948366c926ba9c73c5f8ef38cef8

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