Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b61837362eee3ae…

MALICIOUS

PDF

78.5 KB Created: 2021-05-27 07:00:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 47d144334a355113164033e8cd90708f SHA-1: 989024e264218ac476d9055f8a7028ba720c7cf8 SHA-256: 7b61837362eee3aefcea363a57c2342da88c86f3abc783c1c869d8f45cdc2f06
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-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.
  • 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://maypoin.ru/strik?utm_term=how+to+get+a+eviction+notice+form PDF link annotation
    • https://zosupexaduj.weebly.com/uploads/1/3/0/7/130738593/acfc65.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365612/normal_5fe0b30b1619d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467979/normal_6016d9e171f54.pdfIn PDF document text
    • https://nomikevokatipo.weebly.com/uploads/1/3/1/8/131859895/zofekufozaratotimag.pdfIn PDF document text
    • https://bifekanivixu.weebly.com/uploads/1/3/1/4/131408854/gaver_sinibamolori_jutoj.pdfIn PDF document text
    • https://xizotikozuza.weebly.com/uploads/1/3/4/5/134587863/xuwude_gipilunuzasagu_puwoletepaziji_mubowamuludo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/00db33ce-caf2-4224-9e7c-7155cb053c0b/zumuxil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44700040-25cc-4fd2-a810-5eb499e38f4d/mera_bhola_hai_bhandari_2_song_download_mr_jatt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d27f5a54-eb6d-48a7-bcba-040eef2af4fe/48179226422.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb8144e1-8ea8-4c42-96a5-dabb6ff73e0f/shri_vishnu_sahasranama_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66f58a1b-3efe-46b1-9802-3cc5ab8d3168/what_is_the_importance_of_psychological_testing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ce9a44e-aa37-41e1-908d-23befae63214/43854735614.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96db8fe2-2c1f-4430-8e8f-1b09334613ae/does_costco_sell_roku_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a85c4e1c-f923-4bce-b71c-59ad1c5cb0ef/wexosabol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77de946b-e3a9-4d43-91d0-1341a0925a1a/14733464080.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f32f677b-5778-43bd-95b2-3ffb41d645a5/the_history_of_love_nicole_krauss.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C0 5104 bytes
SHA-256: 0181054168f0c3004bd9f67437ad463c7ed58640198519b3538c08216a31844b
font_01_sfnt_off0001032d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1032D 11768 bytes
SHA-256: 00b95f1037ccc61b88256c451a8a0c50975df30e1a3638d0828567078135dd4b

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