Malicious PDF — malware analysis report

Static analysis result for SHA-256 832263172277d4a2…

MALICIOUS

PDF

76.5 KB Created: 2021-03-22 12:55:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b922d9540c3fae516e3945f6b8b97035 SHA-1: 538c4040498d83c0775c6f4015fac8449040223c SHA-256: 832263172277d4a2e4c52ec4ae644ede6e0fe23355d45a95f542286f65692aa6
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 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 4

  • 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://resalured.ru/award?keyword=tutorial+corel+draw+x5+francais+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407747/normal_6018b65dcfcff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381546/normal_5fe70166c2107.pdfIn PDF document text
    • http://bettermoneytips.com/zen_in_the_martial_arts_joe_hyamsg176j.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414360/normal_6027c3be32738.pdfIn PDF document text
    • http://proflist-kursk.ru/quantum_healing_hypnosis_technique_u8x2p6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382189/normal_5fe670695639a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495858/normal_5ffdeac3c799c.pdfIn PDF document text
    • http://fotonagosuslugi-01.space/symantec_dlp_agent_guide3ejoa.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/zedilegol/fofokuje.pdfIn PDF document text
    • https://104e3d6a-8609-4a5f-ba89-88df40aeb326.filesusr.com/ugd/3cb22f_4f2ea07fac1f41e5bbac79a3756c8c37.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/fapiravifodezutipividesiv.pdfIn PDF document text
    • http://jezevenakos.myartsonline.com/6682545189.pdfIn PDF document text
    • https://2c9641c8-5874-4869-9b94-f1378e60aa6b.filesusr.com/ugd/efc1f6_f4dac8ce765c471f8a96140fc2175ffa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zexozavo/11030902877.pdfIn PDF document text
    • https://11ab4cf5-156d-4417-99e9-5039b2a7eb5f.filesusr.com/ugd/82d61e_53b9e4d4738a496b8e250d7172ddc3ca.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sewamos/garmin_gps_62s_price.pdfIn PDF document text
    • https://d8d691c7-cf48-432b-bece-a54604b57851.filesusr.com/ugd/1e3a4b_6f897eb7e6f74f2bb82eeac658727d85.pdf?index=trueIn PDF document text
    • https://4cd5eafb-d261-4666-a528-29b55b1676c1.filesusr.com/ugd/8dde66_2aae78f48f9d449f9819bc077b6fc418.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/soundpeats_wireless_earbuds.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/22299952371.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/tere_bin_laden_full_movie_300mb.pdfIn PDF document text
    • http://wutejaxevewef.myartsonline.com/xiganavurop.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_off0000ed20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED20 5380 bytes
SHA-256: 9ed0213d386e15ed538aea0084ec49e309d77dc430a2effd7b609b65bc94d6ae
font_01_sfnt_off0000ff97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF97 10780 bytes
SHA-256: a1aafda62c8b8db463fb11d3ab5a84ec5c552d56e04df944ea32979a373d76e7

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