Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd45960b525f941e…

MALICIOUS

PDF

74.8 KB Created: 2021-05-29 08:43:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 9896f3e6ad8f460e30caeed9f311e520 SHA-1: 19019f3416e37cec6f41737973b998a37af3ce1b SHA-256: bd45960b525f941eea951429758c8544a54df372f184978d82e2734a1a4188da
156 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 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 0.9997

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://mezovuduw.ru/strik?utm_term=how+to+interpret+multiple+regression+output+in+spss PDF link annotation
    • https://judamuguduvawa.weebly.com/uploads/1/3/4/3/134352100/827623b2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407562/normal_5ffb119c65a0a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471253/normal_60066e0751de1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401525/normal_60566113eedd9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373261/normal_5ff29644c84b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4506170/normal_606458dd9ecb1.pdfIn PDF document text
    • https://xulobefopit.weebly.com/uploads/1/3/4/3/134349373/kusewutod.pdfIn PDF document text
    • https://zetidepip.weebly.com/uploads/1/3/4/4/134432407/bowepani_jimemuk_pubix_xarevelilin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367961/normal_604a20e72e25b.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/e553452c-7497-470b-b902-d00b2ba3ec13/84932556461.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1425ad10-9246-4aa2-abb9-88e78c74e0a9/pioneer_vsx-521_setup_without_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83f1c73c-8377-4ac2-963b-d06cd1aa8973/les_miserables_castle_on_a_cloud_chords.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/722c1811-3e33-4752-827e-db18c574175c/xonopokazadidumapixofulu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59e0b2db-43d3-48f6-861b-74865d20dce4/super_mario_land_2_gameboy_color.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d18b28a0-84c5-43ef-8fd6-927b422f51fd/diablo_3_end_game_tips.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9739172d-ded4-4a25-986c-52e38b2bb6ea/can_hypothyroidism_cause_adrenal_insufficiency.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cfb7702-18c6-4bce-9098-abc171d0e0d7/apple_books_am_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0bb7ddb-bd7f-4a01-8ce3-5641d0d59d23/gefuxoxitepilita.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/474764b2-d8ea-4a22-90e0-9ee137dbcb8f/77358210305.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8d4da0f-5a18-443a-b883-8210e9fa73c2/mupimulumudoboraloz.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e76a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76A 4980 bytes
SHA-256: 19b00fec936c9612465b1d79ba3d71987cadf86581f28176f95c626d83d9cd98
font_01_sfnt_off0000f85b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85B 10804 bytes
SHA-256: d987db8928dbf08b34a41093c2b2cc2d5da8220615ae9ae2663a035d78ccdf1f

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