Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d92fcffc903a432…

MALICIOUS

PDF

70.1 KB Created: 2021-04-02 21:50:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 32af112e385143db8e0548d4c97c9e24 SHA-1: 57b6f15ee7836fcabd98509a11e32b3870bc4ebe SHA-256: 5d92fcffc903a4327f5fc5317f972b440067bb4cabe8951763d293f68c1e71a1
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. One of the primary URLs, 'https://nipisod.ru/wix?keyword=the+umbrella+academy+pdf+ita', is suspicious and likely leads to malicious content. ClamAV also detected the file as 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0', further indicating malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://nipisod.ru/wix?keyword=the+umbrella+academy+pdf+ita PDF link annotation
    • https://cdn.sqhk.co/nixagigad/hjgQjgZ/73196909186.pdfIn PDF document text
    • https://cdn.sqhk.co/wofikubid/dWzjOVI/vijibulibijesimisisabiruj.pdfIn PDF document text
    • https://cdn.sqhk.co/dawadetugas/fhii0EP/road_trippin_lyrics_az.pdfIn PDF document text
    • https://cdn.sqhk.co/pajerelo/gc5KOaa/word_chef_game_online.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/73e6d463-3ef2-4248-8906-6b05c63ecb08/how_to_dye_hair_evenly.pdfIn PDF document text
    • https://1c54689f-8f60-44d8-8d81-b144d6ea8ada.filesusr.com/ugd/787b0a_328267b09baf4eeba4cdf484bed75a9e.pdf?index=trueIn PDF document text
    • https://4be8a7ba-6c9a-47a4-99fc-a5961b41a404.filesusr.com/ugd/132250_f3acc07277194fc08787d2883a2f5c05.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab7f5d6b-45d9-4666-9a89-743f12eeca03/dunkin_donuts_secret_menu_iced_coffee.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/telecine_play_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a456165-d9ea-43a6-86f1-db070fd46c7e/what_is_most_responsible_for_creating_rhythm_in_a_poem.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/4564447690.pdfIn PDF document text
    • https://95fbbc11-640f-4658-acdf-6e09da746871.filesusr.com/ugd/e42ee3_14cc48574d574324ba4b094bc6759112.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lebejos/trust_audit_report_due_date.pdfIn PDF document text
    • https://e0bfa911-60eb-4c53-bd8d-ceec25156dfb.filesusr.com/ugd/0a052f_bb66ebbcc28a4461bedaeaec5d46dd37.pdf?index=trueIn PDF document text
    • https://2a1457bb-a4d2-449b-8914-d784a503a6da.filesusr.com/ugd/c0fca2_df84cb20bb5849808fdf16155caaa1b8.pdf?index=trueIn PDF document text
    • https://3d7c42e8-cad9-4196-8f3c-0f210fd97588.filesusr.com/ugd/1b7c00_7caabf8c33a6402e9859bdd924d86fab.pdf?index=trueIn PDF document text
    • https://1c019786-7048-4615-837a-ae53f087c4ae.filesusr.com/ugd/8b4172_83a13b521dbc44e0b7c8e7694904c14b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wofaxil/balujuvejulugejobimo.pdfIn PDF document text
    • https://56f9ebfc-1b58-4ccd-90b9-24793863e956.filesusr.com/ugd/0f3536_b9ef73c43eb742a790887a55fceb780c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/34257d96-8f0f-4022-8602-f36a9be787d0/repazudowefadina.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/11210023412.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/lg_direct_drive_11kg_truesteam_washing_machine_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tinezedu/92990570496.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_off0000d353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD353 5408 bytes
SHA-256: 1f99f6061068a275add909f7912c828aa387ee90edfafb45bcfd89ee1cedbb9a
font_01_sfnt_off0000e590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE590 10932 bytes
SHA-256: 2c3653dc6d8c2c401a44eacf7048dce7053ba9b7b936be6e602c3f5aa7ce7bd0

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