Malicious PDF — malware analysis report

Static analysis result for SHA-256 edeac1535047fe4a…

MALICIOUS

PDF

79.7 KB Created: 2021-05-21 07:51:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fd20ba29435bf86d0728d0c7b48dd1f7 SHA-1: 91de7bc5a69efe6a34d00d4ee7647c426f7c4589 SHA-256: edeac1535047fe4ae1ba38539a75f2f9c7a3d05249661551f2a9cd097eaabed4
186 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 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.
  • 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://jumiwimov.ru/strik?utm_term=livro+gest%25C3%25A3o+de+pessoas+chiavenato+pdf+baixar+gr%25C3%25A1tis PDF link annotation
    • https://mewuvirinikupu.weebly.com/uploads/1/3/4/5/134505229/44320c54.pdfIn PDF document text
    • https://sanakutubifave.weebly.com/uploads/1/3/4/8/134849958/4318634.pdfIn PDF document text
    • https://mibubibot.weebly.com/uploads/1/3/1/8/131871690/1812013.pdfIn PDF document text
    • https://jevogebog.weebly.com/uploads/1/3/2/3/132303093/4216066.pdfIn PDF document text
    • https://vajepagipe.weebly.com/uploads/1/3/4/0/134000011/feteza.pdfIn PDF document text
    • https://pipamoximiketo.weebly.com/uploads/1/3/0/9/130969724/f715c95c773.pdfIn PDF document text
    • https://gojafone.weebly.com/uploads/1/3/4/8/134891791/9100214.pdfIn PDF document text
    • https://munijames.weebly.com/uploads/1/3/2/8/132814228/duzegifexi_wuwikoj.pdfIn PDF document text
    • https://lijupumo.weebly.com/uploads/1/3/4/4/134496400/3175f59.pdfIn PDF document text
    • https://rarezeromodon.weebly.com/uploads/1/3/0/8/130874170/kogun.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/2c2f7dc2-fa58-4301-b52c-0b10a64e5958/what_size_battery_for_cvs_digital_thermometer.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/the_hobbit_3_full_movie_download_in_hindi_720p_filmywap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cbdb2f9-e62f-4c35-8aa9-74d2f2f936a2/66140271087.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41353447-5fdf-4e65-88bf-bf6656c3a6a8/what_are_some_boy_names_that_start_with_j.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a573ec1-f68a-48b0-903b-7b1f88ccfb43/5561712252.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6780da3c-d9b9-4a33-869f-9f5b519a4faa/lovozixuxiku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aea61b86-686e-41b6-9c5d-0bb0c1e3f4d5/losomevef.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/33135253453.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/dungeons_and_dragons_5th_edition_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33ecb1bd-3800-467a-b4ef-6ec506a81c89/71153020586.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_off0000ee36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE36 6148 bytes
SHA-256: d9d09db5f6ea909ab54a6316b1e470664f5ba0e5c597df496855ad8e31fbebb2
font_01_sfnt_off000101ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101FF 14736 bytes
SHA-256: cd356cc2f43f40e2ee2f8b7e1fd78d1837584bcdf07f48e318eba55e52558d5e

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