Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2552e8d36d64f98…

MALICIOUS

PDF

82.3 KB Created: 2021-03-17 14:43:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c45310c6d12b6f97f4625ae145d88f9e SHA-1: d8e8d1fd15422566b29e072c1f8490e5c91a48d3 SHA-256: c2552e8d36d64f98f2b51b08f7d106f47d9d1f42606f7bcc45a222e29870e7b5
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://kuzutuzo.ru/strik?utm_term=21+day+shred+men%2527s+fitness+download+free PDF link annotation
    • http://kvyovk.xyz/six_principles_of_influence_robert_cialdini_19843m0mb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464861/normal_60415239a57f8.pdfIn PDF document text
    • http://lifelalulenomip.mygamesonline.org/23519536998.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406473/normal_603d33147c5a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464055/normal_5fd0dffa6df2c.pdfIn PDF document text
    • http://mebovedu.getenjoyment.net/financial_planning_and_budgetary_control.pdfIn PDF document text
    • http://luminar3-download.xyz/cursed_armor_walkthrough_guide3mxhe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459188/normal_5fedd4ac54827.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410204/normal_5feda609bea6b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/13437915436.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4255568-1dbc-40b5-a8e0-7f03fffd00cb/jexutasogufap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c0dd9e5-247a-4f7c-833c-c597facb0785/how_do_i_reset_my_stealth_700_headset.pdfIn PDF document text
    • https://7095e710-59ac-4d27-8a5a-f3bbcaf65deb.filesusr.com/ugd/418e76_62dd14d095ea45f793ae4574752c13e3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5b38382-5ece-4489-9a59-4504b3364787/xanunifuvixepopujomen.pdfIn PDF document text
    • http://dovunufesesiz.onlinewebshop.net/how_to_connect_onkyo_remote_to_receiver.pdfIn PDF document text
    • https://c0771fee-1ba5-4dbf-bba5-a775c3d44c03.filesusr.com/ugd/544e7e_95718f162f7d4616bbb673a535796a46.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/sojedupusoxitufifanom.pdfIn PDF document text
    • https://s3.amazonaws.com/gupojakami/74820822549.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94138b7f-9bc6-43bf-9374-1e46804a62f3/zuwalaziv.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/defimu.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/2003_mercury_25_hp_2_stroke_weight.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_off000101e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E6 5464 bytes
SHA-256: 60d8111e409a89c6ca143a50b411638d923a2572c643f83c95efc0d9d3d2a0fb
font_01_sfnt_off00011470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11470 10936 bytes
SHA-256: c38753ef5d487083dad84dd40613b14d92f4e1a4b088d65c78f905c5b1c07d1a

Open this report in the interactive analyzer, or submit your own file for analysis.