Malicious PDF — malware analysis report

Static analysis result for SHA-256 742e64476b37e821…

MALICIOUS

PDF

97.6 KB Created: 2021-03-31 00:01:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: e63e4105a049a42a06f4280456cb4223 SHA-1: fee9a9259926d0c209bd67952fa7c9c694fe1cec SHA-256: 742e64476b37e821364be1cce25add100781f19031ce4d50203c6c5d214e5911
126 Risk Score

Malware Insights

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

The file is a PDF containing numerous embedded URLs, with one identified as a malicious phishing domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to a phishing site. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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 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://mezovuduw.ru/award?keyword=anguttara+nikaya+pdf PDF link annotation
    • https://cdn.sqhk.co/sesumaku/ghfzhfW/52106534810.pdfIn PDF document text
    • https://cdn.sqhk.co/lewulula/rhdbTHC/25595204876.pdfIn PDF document text
    • https://cdn.sqhk.co/zibepidok/1hb8TCK/kisoripifaronu.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolefowi/FawZtid/airthings_wave_plus_vs_awair.pdfIn PDF document text
    • http://dasiroxejipi.22web.org/banarasi_babu_video_mp4.pdfIn PDF document text
    • https://cdn.sqhk.co/noxivudeva/zihU8gg/fowebijasapejad.pdfIn PDF document text
    • https://cdn.sqhk.co/fagaxirupunu/jce5jj9/paris_texas_weather.pdfIn PDF document text
    • https://cdn.sqhk.co/kajemuwasutu/jaZWw9U/barcelona_events_2019_october.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/2a939951-7736-490f-85c7-84eaa9bcfc45/vopipujez.pdfIn PDF document text
    • https://fd7a53fe-11c1-4e60-83ad-ac1bb997268f.filesusr.com/ugd/5cf23b_d0747d9491094ac7aba05899d2b410e7.pdf?index=trueIn PDF document text
    • http://wovoruvuluriba.epizy.com/4524258671.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e20dc6da-353b-43c8-a988-5170afa5fa51/zebra_gk420d_label_format.pdfIn PDF document text
    • https://e05653fc-386e-4c8b-889d-738aee72c63e.filesusr.com/ugd/62421a_956eedc0ec314b2b98bb1029565210ca.pdf?index=trueIn PDF document text
    • http://pababevo.epizy.com/56755971237.pdfIn PDF document text
    • http://bajipodi.epizy.com/63833712325.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab28c053-a538-47ff-96fe-64c2567306ad/ironman_inversion_table_1000.pdfIn PDF document text
    • https://1ba6f066-89d4-4445-b8a9-08a6de046ef2.filesusr.com/ugd/d40554_0c225c9c626c476f9c0474fb1818870b.pdf?index=trueIn PDF document text
    • http://godofamebowu.rf.gd/catfish_farming_in_the_philippines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/235a3e1c-f852-40ae-8159-7fff4ca89e38/33925892990.pdfIn PDF document text
    • http://temomuduzuba.epizy.com/how_to_configure_zoom_for_music.pdfIn PDF document text
    • http://fupizud.rf.gd/barbie_doll_english_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54a62ed0-9b01-4cde-8745-d66c0cda45fa/21051953582.pdfIn PDF document text
    • http://novezepif.rf.gd/fuparu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12560 4808 bytes
SHA-256: 74cf340231b8d5f7c003c0a1b6d983b498227c4244b63ba7be1f52fc768614ac
font_01_sfnt_off000135c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135C4 22888 bytes
SHA-256: c8bcf72282b0134f7e803271cc3ae3045a695372ec538fecf9a2c01049220ee6
font_02_sfnt_off000168e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168E9 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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