Malicious PDF — malware analysis report

Static analysis result for SHA-256 fec779539fb412de…

MALICIOUS

PDF

78.0 KB Created: 2021-03-14 12:09:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0d675f0d0b2b84d328b6710b75a22396 SHA-1: 947d1bd944b0ffb798b4f810dc5cf2e249fca031 SHA-256: fec779539fb412de4b5667df8cb7ac80b6a2385a32e36f7a6be614186c930487
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://kuzutuzo.ru/award?keyword=college+admission+essays+pdf PDF link annotation
    • https://mogalarozo.weebly.com/uploads/1/3/5/9/135968713/72c5f4aea0e.pdfIn PDF document text
    • https://zafozudakajadev.weebly.com/uploads/1/3/0/8/130814863/tafup_miwipin_runigovinofisaw.pdfIn PDF document text
    • https://pulapiselipatux.weebly.com/uploads/1/3/1/3/131378970/tupesovetobipo.pdfIn PDF document text
    • https://rakawixedisika.weebly.com/uploads/1/3/5/3/135324789/bulixevepam-xoxikepe.pdfIn PDF document text
    • https://kuwomodelinero.weebly.com/uploads/1/3/0/7/130776449/5982beb0052b2.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/2e82b7b0-3d05-469b-8d91-f0c4f785843a/what_is_the_moral_of_the_story_why_mosquitoes_buzz_in_peoples_ears.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dad35484-afae-46ee-8b9d-0134e515a24b/tanoropi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a17c4470-b43f-414e-b30c-71311b0069f4/how_to_make_a_haunted_house_on_a_budget.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6fcadf2-d707-4ead-a649-afc3e18b35b8/52966586790.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/226cd9c3-2041-4332-80b4-b60903c243c4/65902660238.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af969b3e-6a67-489f-b108-d9d707152762/constitucion_mexicana_articulos_del_medio_ambiente.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9ee1a18-02fc-4215-9c92-05a02d8a9ab9/best_tasting_heat-tolerant_tomato.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27198a0f-1abf-42b4-9c87-7a5a39153278/football_manager_2015_data_editor_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c400c38c-ac1a-4f23-beba-b39fec9a202a/20391904894.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d581b1b-9509-4f52-8981-8c68fe768fec/82287045449.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79ea658b-8f0f-4484-bbd9-167a254273ea/sanyo_crt_tv_universal_remote_codes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8be55d23-2a74-4215-a509-f33bfef656c0/berserk_manga_ending_date.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42b74b9f-a209-4402-a6a4-8cdbd94bf6ec/50049084245.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_off0000f3c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C2 5272 bytes
SHA-256: 0bed546b29b700cc52a424e4d51fdd07e3af43735dc2d8bbc56fe54209f44d2e
font_01_sfnt_off000105ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105AB 10432 bytes
SHA-256: 1c3aafae0e409634b6f6e44957b50496fadc3215a4478ea5b90967e87f2604a4

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