Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f127e0b0032f78a…

MALICIOUS

PDF

88.7 KB Created: 2021-05-05 19:03:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 1bc3c8285807831d21ba0999896506b4 SHA-1: 7d3d4c3a1af4f1fd10462d3c0d31367d333e231c SHA-256: 9f127e0b0032f78a62f314bad21434e531503a6be8b4c13ee0b7f7e50a46311e
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection to malicious content. ClamAV and ML classifiers also flagged this file as malicious, specifically as a phishing trojan. While no scripts were directly extracted, the PDF structure and link farm indicate an attempt to direct users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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://cdn.sqhk.co/gipudeviwapi/Nid97hf/cinemark_peru_plaza_lima_sur_cartelera.pdf In PDF document text
    • http://tawaguf.scienceontheweb.net/building_maintenance_system.pdfIn PDF document text
    • https://cdn.sqhk.co/nanijamu/cigjiji/european_golden_boot_winners_2020.pdfIn PDF document text
    • http://revilokepudidu.mygamesonline.org/samiladelegu.pdfIn PDF document text
    • https://cdn.sqhk.co/lunosupi/bY8GifE/one_gun_stickman_mod_apk_1._91.pdfIn PDF document text
    • http://tupaxeguna.scienceontheweb.net/suririwatawofeve.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/o_fyKxYoRT8/wb?keyword=what%20is%20vocational%20rehabPDF link annotation
    • https://s3.amazonaws.com/lodazojamuva/51930572048.pdfIn PDF document text
    • https://dda5c79a-a75d-44d9-a006-48dec3bfe172.filesusr.com/ugd/115d6e_786ed4bcc17b4d299aa1dc87ac791b6b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/forupokisip/best_photo_editor_app_for_android_mobile.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/71918377138.pdfIn PDF document text
    • https://c1d61d78-9bae-425c-b347-ee91470fe4f1.filesusr.com/ugd/60933b_7e89d45c6c144f19b74e9d1e4fc27f5f.pdf?index=trueIn PDF document text
    • https://a519209a-2b0a-481f-9fe9-460c873bdc80.filesusr.com/ugd/270e53_654f25e2491a46349b66d5c410016cb0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/balkh_province_map.pdfIn PDF document text
    • https://8c77b9b7-c39b-43d6-9406-6086bd2c0f93.filesusr.com/ugd/ee6770_b3d4c118fff9471ca9216b8f16e21592.pdf?index=trueIn PDF document text
    • https://e0d0d77b-4c00-4265-bc22-f0cc5cf11ada.filesusr.com/ugd/957eb4_39f8f9ddeea54849bd53bb086e9c3a7b.pdf?index=trueIn PDF document text
    • https://49550882-97ce-44db-a38b-6e383bb81149.filesusr.com/ugd/062c90_0001999933a04ac6bf7fd78ec9f0ce6c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/metigab.pdfIn PDF document text
    • http://xazopufegi.onlinewebshop.net/cinderella_1950_script.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/najirefabumamiwofifupodel.pdfIn PDF document text
    • https://b81e1767-bb0d-4562-9f98-cfef66859bb1.filesusr.com/ugd/b48b60_78deae63411a49b8973aa24b6376f76c.pdf?index=trueIn PDF document text
    • https://ad9e3d1f-bb22-46ca-892e-b6aa3325a756.filesusr.com/ugd/837d34_cf6fa3122b924d1e93ee38a6c274f4f3.pdf?index=trueIn PDF document text
    • https://7ed754b6-a209-4558-9281-0032c7ee8ade.filesusr.com/ugd/4329d7_36871e94d4d14562a63b4407bb962eff.pdf?index=trueIn PDF document text
    • https://f59c0a4d-c104-43ac-8966-a5978cdf1b8c.filesusr.com/ugd/0c1ebd_e3860d240f9b4c6189e095fbe0ac573c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zafirawit/numerical_expression_worksheets_4th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/kixifumujedizovek.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_off00011a46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A46 5100 bytes
SHA-256: aca66c3d033eb362c96d8e119bd9674d979a70f100077610a74f4d7b81b278b8
font_01_sfnt_off00012bab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BAB 12212 bytes
SHA-256: b3c9d9d94f54f80eb19f2b655a6b0ae48795efb9e3e5d51094d616750c8acef7

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