Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0e086bf8523c595…

MALICIOUS

PDF

76.8 KB Created: 2021-04-01 20:45:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 6ee6ecbba4b1d14d483f4d19fef565f5 SHA-1: 415ac505ba97d1504b43ae0b50afe304b6c95ceb SHA-256: f0e086bf8523c5951250a7f40b5b33543cbca18170aa5275b78fc437a38c87e1
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with several pointing to known malicious redirectors or link farms. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/wix?keyword=laid+bare+lauren+dane+pdf In PDF document text
    • http://fazejajogavu.medianewsonline.com/36395243835.pdfIn PDF document text
    • http://juxumigine.mypressonline.com/tazutisozarafipefosidiwa.pdfIn PDF document text
    • http://pifemukopisare.sportsontheweb.net/energia_eolica_en_el_mundo.pdfIn PDF document text
    • https://bagirarivevi.weebly.com/uploads/1/3/1/3/131384609/0e5738e113b.pdfIn PDF document text
    • http://nefutekugurenap.mygamesonline.org/76868364663.pdfIn PDF document text
    • http://sowopezamiw.medianewsonline.com/whirlpool_washer_will_not_spin.pdfIn PDF document text
    • https://lufojujerap.weebly.com/uploads/1/3/4/4/134481619/joxope.pdfIn PDF document text
    • http://podifodosej.scienceontheweb.net/adyen_ipo_prospectus.pdfIn PDF document text
    • https://fibukumaguwin.weebly.com/uploads/1/3/4/7/134770434/5978546.pdfIn PDF document text
    • http://pumorux.medianewsonline.com/83658467598.pdfIn PDF document text
    • http://bajifepeselok.sportsontheweb.net/definition_of_communication_technology.pdfIn PDF document text
    • https://bedaruwi.weebly.com/uploads/1/3/5/3/135326402/3ef283a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/hotel_banquet_event_order_template.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/cpm_algebra_2_answers_chapter_5.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/construction_safety_glasses.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/410ef88a-0613-4236-be82-9c311f9f789f/18424442487.pdfIn PDF document text
    • http://gubawakelu.onlinewebshop.net/printable_number_line_1_20.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd5faae9-8341-44d7-bb2e-4bc5931a93aa/butterball_deep_fryer_turkey_size.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86439dec-5ff3-439d-a5e0-51e1c058f43b/song_of_solomon_catholic_interpretation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2716742-c3b8-4f74-a57f-01147dd066c2/bosch_300_series_dryer_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/waxojixop.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/inshot_video_editor_cracked_apk.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_off0000ecb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB5 4936 bytes
SHA-256: d969541a355b20934c09e688ae3e1437212ecbc23ef07e65113d43670e2efb8e
font_01_sfnt_off0000fd87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD87 11836 bytes
SHA-256: d53c4cd2acce907935add991e5d51eb7aed6b6e64fd562efb1ba7678642aa340

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