Malicious PDF — malware analysis report

Static analysis result for SHA-256 88f4a53c0feaee6e…

MALICIOUS

PDF

83.6 KB Created: 2021-03-22 17:13:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a2de2148308604f7d98e8f5f3f4c2b74 SHA-1: 4349bc4fa50a293a1f310684f53aa32485b83ebc SHA-256: 88f4a53c0feaee6e3c7e09114cd8e1d9c32a3715ba8b24ec2fdcce13865f0bb3
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/wix?keyword=geometry+chapter+4+test+form+a+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4405904/normal_5fd7b43563fa3.pdfIn PDF document text
    • https://cdn.sqhk.co/rapavuse/OhbhhNi/football_manager_2019_squad_update_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/zoraxiraga/p41bRqo/kabunasawajedewamolemedak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417315/normal_604b9d9237e14.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409606/normal_5fe5ec6d8db2d.pdfIn PDF document text
    • http://pifanaliriwabo.mygamesonline.org/couper_un_en_plusieurs_foxit.pdfIn PDF document text
    • https://cdn.sqhk.co/lirebirab/jfagegi/lagifetitivepugajed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://giwokekurodi.rf.gd/80597868579.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec1dd04a-3b14-45c1-83a1-0c2de93e1bed/reretuzigerajuleki.pdfIn PDF document text
    • https://s3.amazonaws.com/gopifu/sijelomiwopi.pdfIn PDF document text
    • http://nejarisiwudu.atwebpages.com/vegetarian_foods_for_fat_loss.pdfIn PDF document text
    • http://lunupesefobe.rf.gd/69884054102.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/lejesizexiritajugi.pdfIn PDF document text
    • http://betizig.epizy.com/kumuduvamasaravisamu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29476155-c24e-4775-8b9b-167892dcab18/elements_of_design_space_definition.pdfIn PDF document text
    • http://benifolagalat.epizy.com/wimivakubiladevolonoxapot.pdfIn PDF document text
    • https://s3.amazonaws.com/somisilegex/demon_hunter_pvp_guide_skill_capped.pdfIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/opera_mini_sports.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ff26a42-458b-42b2-83fb-e1d8c7493868/how_much_do_dutch_bunnies_cost.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/bittersweet_symphony_song_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E7 5536 bytes
SHA-256: 51dc6f480c691e7920ed2f37d7d338d08cb39adb6dac842136c8dfc16e94c1df
font_01_sfnt_off000106b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B2 10616 bytes
SHA-256: 07eedee9197022757a014736887e36a489c872c31ef57a04e40b4f033bede59a
font_02_sfnt_off00012b2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B2F 16272 bytes
SHA-256: 79a8b90f55ff6552f604b654de9415a285e7315ac61835edf8590ffdbde93965

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