Malicious PDF — malware analysis report

Static analysis result for SHA-256 9054bfdc2cff8098…

MALICIOUS

PDF

75.6 KB Created: 2021-03-23 10:20:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 55c6afdb2823c9e6f82c0d042d22006c SHA-1: 1ab85f45b754d40c3b90a857570786b8d2c27401 SHA-256: 9054bfdc2cff8098c375a4cc0d60a0d9e1f405007779c95cd70bc3ae6a6ace42
186 Risk Score

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 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/strik?utm_term=problemas+de+la+educaci%25C3%25B3n+especial+en+m%25C3%25A9xico PDF link annotation
    • https://dovidememalow.weebly.com/uploads/1/3/4/6/134601329/5da6857a.pdfIn PDF document text
    • https://tosofovopige.weebly.com/uploads/1/3/3/9/133998067/68558e858ee03d2.pdfIn PDF document text
    • http://vitogap.22web.org/murottal_juz_30_mishary_mp3.pdfIn PDF document text
    • http://zudepogumo.medianewsonline.com/why_is_my_bluetooth_dongle_not_working.pdfIn PDF document text
    • https://petapizegu.weebly.com/uploads/1/3/4/3/134327096/demamodibimup.pdfIn PDF document text
    • https://bexusisase.weebly.com/uploads/1/3/4/5/134596812/tewukotefolol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://daluxufugul.epizy.com/tudowoma.pdfIn PDF document text
    • https://76c87692-cca9-4651-be8e-de6412dad411.filesusr.com/ugd/fdad67_9208afcb883245da8bf26aac3a68f588.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/28c883c3-33ef-4af2-8be9-469879217f43/git_cheat_sheet_github.pdfIn PDF document text
    • https://c4bedd8b-a3e9-4aa8-9751-a6fde4035b7e.filesusr.com/ugd/037f08_a6f9df5f7aee4cf48cc8a845b3f2fdae.pdf?index=trueIn PDF document text
    • http://ratazudawi.epizy.com/es_calo_formentera_ristoranti.pdfIn PDF document text
    • http://vugugemo.atwebpages.com/dell_u2913wm_wall_mount.pdfIn PDF document text
    • https://176fe727-baa2-4f6f-8ab0-cddcd97ecb74.filesusr.com/ugd/45df28_462aa21361574c8aa831b23d4f6c9457.pdf?index=trueIn PDF document text
    • http://ramogefakox.rf.gd/55519118256.pdfIn PDF document text
    • http://vawerudarasikow.myartsonline.com/12996508831.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/wipifaviwigexep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a09643b1-29d6-4e8c-94c8-add6931cee16/wutapefaguna.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/85700809219.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae4ca059-872e-4434-9668-0ce2241232d1/what_can_i_see_in_the_sky_tonight_uk_satellites.pdfIn PDF document text
    • https://6d251753-49d0-4f5b-a278-10ed1cacc9d0.filesusr.com/ugd/5c139a_66f53191ad7e4ec7bb741fca8c95d03e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b38e105-7694-425b-beb8-eb54b5d9b169/guitar_chords_songs_for_beginners_hindi.pdfIn PDF document text
    • https://deed868a-3c3f-4b0d-b3ae-f9ebe8a38c33.filesusr.com/ugd/95283b_c780fb3416fb4d7f8a12c33e73704eb7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wetevali/polk_magnifi_max_review_cnet.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_off0000e802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE802 5708 bytes
SHA-256: ed4e6f114444f85f1a9d7ed6fdbb1a822ba296edd94b0d049a4483188e94cc3f
font_01_sfnt_off0000fabd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFABD 10960 bytes
SHA-256: b6671c13df5e3f014ad6728ffabe03d0fab4c932f6d68f9912e0451ccc4590cf