Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ce94164ea90522c…

MALICIOUS

PDF

79.2 KB Created: 2021-05-02 06:44:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f70d0eacb40d8ee632384a5747c60d26 SHA-1: c5bdf983c4c5392df6e02bcc93e14bcce0046459 SHA-256: 8ce94164ea90522c205a1f29b9cadca7a2d1e8219e75c7b6f019628910f266f7
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://pelibifir.ru/strik?utm_term=math+focus+grade+6+online+textbook PDF link annotation
    • https://vazonani.weebly.com/uploads/1/3/1/8/131871537/fogiganaxan-bobirir-zufipaxob-legotuwow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369508/normal_60325e237db87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407069/normal_60446f2ed5628.pdfIn PDF document text
    • https://ralunudedosamot.weebly.com/uploads/1/3/4/8/134856058/xibafubaletu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451932/normal_5fe993a925a57.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/9e342d01-32e5-4251-bc5f-9d9f6f29c1a5/the_book_of_unknown_americans_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/tamil_to_english_dictionary_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/beiimaan_love_movie_filmywap.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/fds6679az_mosfet_datasheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5f51efb-4d89-49e5-b558-56290af98a86/what_does_a_2.9_grade_point_average_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a4c5db4-df21-4d0e-ae23-6dc1b5caedf4/59782629180.pdfIn PDF document text
    • https://9b08d158-0e0f-4203-9b31-e1272d977b1c.filesusr.com/ugd/086daf_96e93fafbed74f6fa08989f10a0f6751.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/09cf2c45-7def-454f-8792-a43e004451c6/medieval_warfare_reforged_discord.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/81939731164.pdfIn PDF document text
    • https://31c8a3d4-0132-49f1-a04f-09c79d03e01f.filesusr.com/ugd/a4da84_df0bd91297294e07ac0df0094a600862.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gozifep/screencast_software_for_pc_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/greenworks_pressure_washer_1600_wont_turn_on.pdfIn PDF document text
    • https://6c639bf1-704a-4500-b661-329758898742.filesusr.com/ugd/02d620_c5478014781140db89fcea7dc8e3c16c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d369225c-4432-4f04-9040-c41c4e1eb10b/bijozesenemilosumezavo.pdfIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/nawizuz.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E8 5712 bytes
SHA-256: 8d69b3e55e78d02d65917d48e41ae7956da3c20fcc88fa0368b07b0be3e186be
font_01_sfnt_off0001086d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1086D 12024 bytes
SHA-256: 512794a107034a779210a3eb49fb4dd73ba9f68af82f859b7b7984e0aee80929

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