Malicious PDF — malware analysis report

Static analysis result for SHA-256 062332330215fde4…

MALICIOUS

PDF

75.0 KB Created: 2021-03-31 07:03:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1970e0134284d6fe36f99dea56d912fc SHA-1: 1adf9b4693e4a0e29b9a681922fe26b6398a230f SHA-256: 062332330215fde47b61fb21fd165653c3bf1e8a9781667b71954f0b37f2f357
156 Risk Score

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 a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/wix?keyword=you%2527ve+got+rights+icivics+answer+key PDF link annotation
    • http://canlisohbetim.net/oasis_champagne_supernova_mp3_wapkan4zpx.pdfIn PDF document text
    • http://kexolifowuj.medianewsonline.com/90657329484.pdfIn PDF document text
    • http://cleaner-inn.club/vegevimonefutugobugiy.pdfIn PDF document text
    • http://filanion.online/1745554046v4ntr.pdfIn PDF document text
    • http://omoikiri.info/736957738792qm8p.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/shop_vac_switch_repair.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/60840157885.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/what_is_the_fire_next_time_about.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/mapirunivazufiponinumu.pdfIn PDF document text
    • https://e028ba52-6c86-493e-86b7-fecf7cd1c3eb.filesusr.com/ugd/bcb9fd_fd00a91e764344c19b9279b87cc74e5d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mijumomub/london_dreams_movie_video_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/yume_nikki_dream_diary_achievement_guide.pdfIn PDF document text
    • http://bemabam.myartsonline.com/25082450012.pdfIn PDF document text
    • https://85d2c5a2-fc31-4f76-86b4-4ebe2abe2bf4.filesusr.com/ugd/a8cc01_e0675ade32884351a4b95384f6755aec.pdf?index=trueIn PDF document text
    • https://5de6e22f-064f-4859-b003-4eaa502c5056.filesusr.com/ugd/2609e6_96a5b880c8874710a5457257d10b28bb.pdf?index=trueIn PDF document text
    • https://16fd3b15-5541-4454-9538-28daacbf497e.filesusr.com/ugd/e32576_f26634d3ae5b41b8b1b646387ac1fddd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/what_are_the_interview_questions_for_safety_officer.pdfIn PDF document text
    • https://bea00909-aa88-4d38-ac88-e56db460b486.filesusr.com/ugd/923104_197f6804e83c43578bc6a9f900c02e91.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gulapore/12588044110.pdfIn PDF document text
    • https://9fbeb193-358d-48fe-b9d9-45f8b63f6b3c.filesusr.com/ugd/ab67b9_d6383d0a87fa4103ae1ee25147973386.pdf?index=trueIn PDF document text
    • https://58eafb2e-ea74-4523-a1b2-d2e0fe9bfe54.filesusr.com/ugd/466fa0_e7b88786431142a381e2c38fbad65d04.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/80155909467.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_off0000e7b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B7 5340 bytes
SHA-256: 7ee6b0cbc6748d24327951ec68dceaf36ae84efd9e9a5c1bd19c7b5e27b3aa34
font_01_sfnt_off0000fa09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA09 10700 bytes
SHA-256: bf9d977fe07081da683a0f4b046bcec514a8c0213af1e6f847b98dd9d4855c7f

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