Malicious PDF — malware analysis report

Static analysis result for SHA-256 f62c8a1f6ca05ea0…

MALICIOUS

PDF

81.8 KB Created: 2021-03-13 14:17:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8eda07bcea0867b3794b4c14f45494b6 SHA-1: cc458b14f97a943cf07be9a0ef0a7ee6416e9c3e SHA-256: f62c8a1f6ca05ea065ae37a5bccf547003b9c5219d0387948ef83d869988cb8d
96 Risk Score

Malware Insights

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

The file is a PDF document that contains a URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily garbled, suggests a lure related to a poem, which is then used to mask the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://botokaw.ru/aws?utm_term=poema+en+lengua+maya+y+espa%25C3%25B1ol+corto
    • https://static.s123-cdn-static.com/uploads/4466379/normal_5fc5b12290c81.pdf
    • https://cdn.sqhk.co/dabozijide/hbhefc0/zuwolotofeminisezeg.pdf
    • http://piredvizhnik.com/how_to_stop_hp_printer_printing_test_pageuxpef.pdf
    • https://static.s123-cdn-static.com/uploads/4373770/normal_5fed9646816ae.pdf
    • http://wexypay.icu/lopatodojufogefeporuwujanvqzum.pdf
    • http://hurleyshamburgers.com/pogalalotatanixudukezutnu1dx.pdf
    • https://cdn-cms.f-static.net/uploads/4446497/normal_6040a5c099e9c.pdf
    • http://imedo.ru/yin_yoga_poses_for_sleepao1kx.pdf
    • http://rezotu.xyz/is_the_landlady_by_roald_dahl_based_on_a_true_storywhep8.pdf
    • https://cdn.sqhk.co/tikisudolo/331PKof/60636631958.pdf
    • https://cdn.sqhk.co/zifixanuk/jaiijgs/rarivelofalelagu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fonazuzixagizir/sogixipof.pdf
    • https://435a888a-8f80-410d-aa77-77edd6e4491d.filesusr.com/ugd/51fec0_2a85962f2ae64864a02b5e4bfef5f927.pdf?index=true
    • https://s3.amazonaws.com/pewebopufupe/backcountry_gear_guide_2016.pdf
    • https://s3.amazonaws.com/kelukakeb/91986770041.pdf
    • https://uploads.strikinglycdn.com/files/c9a8d4ef-e739-4876-af66-378f140859d6/vasiteka.pdf
    • https://uploads.strikinglycdn.com/files/01e8b0a6-b4c8-433a-ac03-e40471195485/56306531600.pdf
    • https://uploads.strikinglycdn.com/files/d0034f0e-717b-41b7-bde7-6bfe2b2d2173/19524604344.pdf
    • https://814cba0f-f649-4223-bfe6-7884e6e02b9d.filesusr.com/ugd/c1108c_fe657f1c45a84af3a65b9e8f567f1b10.pdf?index=true
    • https://s3.amazonaws.com/xutomoxu/sasibijilipopaxaw.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc9f.bin
fe22fa67ddc44095f320765f36e06974dc5a5ecb8d194195bcefa3f5c846d09f
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9F 5568 bytes
font_01_sfnt_off00010f3f.bin
066b53e87d3f44f4d6bf796a5339f683f0d5ec4ae8fe70214182dc4491896c59
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F3F 12704 bytes