Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fd3672dff0f69ae…

MALICIOUS

PDF

80.9 KB Created: 2021-03-20 22:15:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 20b7506770e4fe98c3df7810d3b53933 SHA-1: 75d61c7809a478141eb3923982d627f9e9df7e72 SHA-256: 6fd3672dff0f69ae6c64f27bd7367dee615af7a906bfe7c77d4c3f29528622c5
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a significant portion hosted on disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, contains keywords related to a 'solar charger project', which is likely a pretext to entice users to click on the malicious links.

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://baarspo.ru/award?keyword=proyecto+de+cargador+solar+para+celular+pdf PDF link annotation
    • http://sufulilutidake.mypressonline.com/5978737116.pdfIn PDF document text
    • http://jedilinosur.mywebcommunity.org/caravan_encyclopedia_book.pdfIn PDF document text
    • http://zarewubizeno.mywebcommunity.org/libros_de_contaminacion_del_aire.pdfIn PDF document text
    • http://bikejesoxatelo.mygamesonline.org/nikon_prostaff_3-9x40_silver_bdc.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/08625737-51fc-4293-9bf4-de45256748a7/how_much_does_a_criminal_defence_lawyer_cost_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae42904f-1802-4e4c-aadb-4503d998fbe2/what_are_the_healthiest_snacks_for_weight_loss.pdfIn PDF document text
    • https://bf68d742-fb98-404a-ab47-1dcf24f7df52.filesusr.com/ugd/83e7fd_2eeaa5db811c494eab5f8e072215ecbf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e6ed54b-c429-4b95-a618-61b99ac62ed7/suluzozojeto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e767d54-683a-4a0c-8088-d59aa79efe83/where_are_barcalounger_chairs_made.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/920bd193-88de-4a47-800c-6d1c29c77c00/python_loops_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/911e398e-99ea-49ae-9e5f-7f0d4f942273/asus_rt-ac66u_reset_password.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b4048bf-3350-4f78-8b70-1607382185ca/fupalopoxadivovefobuxetuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/233dc25f-c934-45a5-84fa-50d1dcdc5b7c/cirque_du_freak_movie_download_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afc05117-a87e-434f-8daa-cfa55b7338cf/fukisadoxomutozuxitusel.pdfIn PDF document text
    • https://c09438b0-f1cf-4ade-afa2-d322e048c450.filesusr.com/ugd/313cc6_52ba11caf38a482b8215a63b97da98a3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbacb928-98e0-4eb9-b026-8bdb24107731/72277474447.pdfIn PDF document text
    • https://0ccb9a81-bd3c-41bd-bc79-2352350f0e5e.filesusr.com/ugd/95ea6b_658f669a8e5e4b23bf70b7433ac6fdaf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cebec93-2fdc-4ffe-920a-7e808b5ce871/morumivomokenobikudi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b172fd29-33f5-4c6b-9761-bc26a000a6de/73023875096.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b55ee94f-6cf0-49d1-97e3-838c44473dc1/kibawavabo.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_off0000fd06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD06 5428 bytes
SHA-256: c860ea2e9392dedd084dbc00000e4ca8374381c5e14011076292500b994a1cdd
font_01_sfnt_off00010f93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F93 11864 bytes
SHA-256: 70390cfd0fa97bac7f5d0685186e60fc80e36c8fa6d2384dedf3b33736c09db7