Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a88a0cc4ec1360a…

MALICIOUS

PDF

77.1 KB Created: 2021-03-29 14:25:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 20a731a4b859c864db34f4a91aa8a28a SHA-1: 875469ceb640a30959b5ed2f0705a7e8cce9238a SHA-256: 6a88a0cc4ec1360a968c740b78ffc03bcccf7a2e57ceb80bb5def2019d23e0d0
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, a technique often used for SEO spam or to redirect users to malicious sites. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of these links. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://gimoguvi.ru/award?keyword=alexander+technique+for+musicians+pdf PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6f8eca1-3cf2-499d-b21a-51a9d9bcb2ab/42462502062.pdfIn PDF document text
    • https://s3.amazonaws.com/sogovekevi/jeton.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/proc_sgplot_histogram_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0736b50d-5818-4932-93ff-438ec4459df5/digimon_world_piximon_training_manual.pdfIn PDF document text
    • https://6cf80756-66c2-4d2e-b15d-ff1677cb7115.filesusr.com/ugd/2257e8_e91819a478bf4593bed4166a50a62fcf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/561c99a5-0fe3-45f6-8de3-ed66cdb59720/how_does_call_block_work_on_cordless_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/org._apache._commons._lang3._validate_jar.pdfIn PDF document text
    • https://023e3b0e-89aa-4e00-bd19-175c11a0a9c0.filesusr.com/ugd/5f4883_ac34472b42fe4776a39495a259258a39.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/18358235001.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/61805870357.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ea0ee68-638e-4a55-adda-667f24685640/how_do_you_make_a_word_cloud.pdfIn PDF document text
    • http://novosumagib.epizy.com/watuxugika.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec20deb4-1b49-43f3-b737-3da18fe45dcb/6488269371.pdfIn PDF document text
    • http://lokatetaf.rf.gd/blood_type_b_diet_plan.pdfIn PDF document text
    • http://pubometev.rf.gd/4891987596.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/cts_automata_fix_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7950d879-b766-489a-8347-0e2cea70c168/fugupowun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c8b97d8-3c5c-4533-84be-e3058e8f3856/11926038827.pdfIn PDF document text
    • http://sotemapepuko.epizy.com/laser_cut_box_template_vector.pdfIn PDF document text
    • https://201a0bc5-0eb3-4135-8969-828875a6b07d.filesusr.com/ugd/607883_af49997bcdef4c46b0f084a972e058d4.pdf?index=trueIn 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_off0000ed8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8F 5580 bytes
SHA-256: 6903c167d4051d1b6bf84fdcc2b45b93344c7cdaa1163a5b4ace418ea606b961
font_01_sfnt_off00010062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10062 10880 bytes
SHA-256: 87f27ea1084032d404d652b1d685aac847973a468a60b6d71219b1674c5d1ca7

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