Malicious PDF — malware analysis report

Static analysis result for SHA-256 94ed6ef8cd061a70…

MALICIOUS

PDF

91.5 KB Created: 2021-05-08 19:04:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 4c55afd34a3788fcdf62185aa6d560a4 SHA-1: 32abbcb0eed44726d80148bbcb64b5fa5407408f SHA-256: 94ed6ef8cd061a70ee42750aa9d30f3313a6f8848830ffd95f3a7e2c5b1ab93a
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning classifier indicated a high probability of maliciousness. It contains an embedded URL that likely leads to a malicious site, suggesting a phishing or credential harvesting attempt. The document body, though heavily obfuscated, appears to be a lure related to 'expository text structures'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/strik?utm_term=expository+text+structures+description PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403141/normal_606dfca7374e1.pdfIn PDF document text
    • http://feseburowikuted.22web.org/1716108014.pdfIn PDF document text
    • http://gutowofobujibos.iblogger.org/stories_i_can_read_to_my_unborn_child.pdfIn PDF document text
    • http://gomakugagazeg.iblogger.org/korobusujipegim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482413/normal_60401690adcc0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390371/normal_602809950076b.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://s3.amazonaws.com/gebukil/86345241748.pdfIn PDF document text
    • http://tujatubaniza.epizy.com/anti_ragging_form_fill_up.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/verification_of_property_condition_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/439e71d4-1531-4da1-b841-abe82f46969e/spotted_lanternfly_pa_map.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/32601602697.pdfIn PDF document text
    • http://xasepeza.rf.gd/68067238005.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/dazuru.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/lagu_waktu_yang_salah_matikiri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9c76f34-1bce-476a-bd18-6791ddd5eba9/sotimamigudekapaduzonefup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c32ea1e3-901a-440d-ad2f-3234a42ac5a3/learn_korean_language_sinhala_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/draw_with_jazza_creating_characters_amazon.pdfIn PDF document text
    • https://s3.amazonaws.com/xepululejiwof/what_size_battery_for_murray_riding_mower.pdfIn PDF document text
    • http://tolejax.epizy.com/fevemujukobawan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4091775b-f686-4201-89d6-2b416e1623d0/vosewisa.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10542 4836 bytes
SHA-256: 2159472768e5b3607c7e99fc6d82855dd946e3078ff97afc5c16248b69cbcdba
font_01_sfnt_off000115cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115CD 11516 bytes
SHA-256: 4c593bb63aca90b9b7a33c1bb52dfec68fd84079bcdd2c006928ec64134d2341
font_02_sfnt_off00013ca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CA4 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449
font_03_sfnt_off000151d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151D3 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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