Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c5750da352c2163…

MALICIOUS

PDF

87.4 KB Created: 2021-03-15 22:43:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 33c24ea0f872a6eaa1fa837722f3836a SHA-1: 2f866ae4c5e54916391ee8a142527e36b5495758 SHA-256: 3c5750da352c2163439638a8bbfe81c38326a7408ec66c4183b9ba0f8643caf8
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 0.9989

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://xajibur.ru/123?utm_term=oral+candidiasis+case+report+pdf PDF link annotation
    • https://rupevegix.weebly.com/uploads/1/3/4/8/134887155/4924876.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416494/normal_60189f7236deb.pdfIn PDF document text
    • https://telozigigozato.weebly.com/uploads/1/3/4/3/134310186/364517.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413976/normal_60388aea7240d.pdfIn PDF document text
    • http://kizefet.iblogger.org/xowezuzogiroduxevupox.pdfIn PDF document text
    • http://fesaniru.iblogger.org/rotalapesogeruzu.pdfIn PDF document text
    • https://wudigunufite.weebly.com/uploads/1/3/4/6/134611509/3395161.pdfIn PDF document text
    • https://lerizizevu.weebly.com/uploads/1/3/4/3/134314130/vefavunizuz.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
    • https://ba428ff1-d53d-4eb5-bdb2-cc960067f420.filesusr.com/ugd/7041e4_fd800fda500b424ea38e8d5683ec7065.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jazofi/fojokativeminewurojekedul.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/29912192389.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/audio-technica_at-lp60_bluetooth_white_vinyl_record_player.pdfIn PDF document text
    • http://kotuwelu.rf.gd/autocollimator_principle.pdfIn PDF document text
    • http://kogawazer.epizy.com/how_to_draw_a_simple_tree_without_leaves.pdfIn PDF document text
    • https://43cb2d18-1589-43a7-b1c5-fe1278e1c76d.filesusr.com/ugd/370b54_f42aabbcde714967b4a229544f464b7f.pdf?index=trueIn PDF document text
    • https://e1318bff-d970-45e2-bcea-45481503a18b.filesusr.com/ugd/75a96d_bc980d7687e14b3fb346f9e363f0c0db.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/oporadhi_song_lyrics_in_bengali.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/47235251960.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/zekagifobugexobi.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/debex.pdfIn PDF document text
    • https://7095e710-59ac-4d27-8a5a-f3bbcaf65deb.filesusr.com/ugd/418e76_25cfce35e05f49859adffa6a7eba9bf7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/spreadsheet_software_compatible_with_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/bugitowolazixaperevirobel.pdfIn PDF document text
    • http://goguvero.epizy.com/98143416568.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/shirt_size_guide.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000108ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108AD 4964 bytes
SHA-256: 6047ddfa12bbeda4b80f3e4a5822e4462f5720946ae283aab32e142b965aa94f
font_01_sfnt_off00011992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11992 12532 bytes
SHA-256: d68a61e2ab0d038dafe6332d2cc04eb99a4c6fffe59a62961a600a935ae68ca4
font_02_sfnt_off000141ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141CA 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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