Malicious PDF — malware analysis report

Static analysis result for SHA-256 769128960f69b0bd…

MALICIOUS

PDF

80.1 KB Created: 2021-03-24 19:42:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 19f1986ee47f71e620a26ae9beb25ccc SHA-1: 1f11b94cb1cc49cb95cfe38927af3d4fadc562a8 SHA-256: 769128960f69b0bd940e4d5ac5d06dcbc68cf4b0db9b6a5527481ea58b4deb1a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jottigo.ru/123?utm_term=pc+build+guide+linus+tech+tips PDF link annotation
    • http://zesegalos.scienceontheweb.net/27069702070.pdfIn PDF document text
    • http://fasekafalig.scienceontheweb.net/disagesidut.pdfIn PDF document text
    • https://numeroluxovuz.weebly.com/uploads/1/3/4/7/134733954/0e87f737e.pdfIn PDF document text
    • http://jawixogu.mygamesonline.org/90640452193.pdfIn PDF document text
    • https://bozaxemavokasum.weebly.com/uploads/1/3/1/3/131383719/vokupatolanofiropo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/5ddfdd49-3e27-4a68-85bf-16b35c7fa422/64233914564.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efb4fc3c-449f-4f4a-834f-afbd4929dabf/mipubekufubukakulosa.pdfIn PDF document text
    • https://7162f0c1-3bb2-4775-9ad2-1e34613fb889.filesusr.com/ugd/595093_d72b0eb2a50a4acbb6fdc789e1c52946.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/33c87987-d18d-4f37-ba61-da8bde2c81cb/anxiety_worksheets_for_young_adults.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1ef25be-9192-4460-becb-7836a410ccbb/sexedisopow.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/89539314029.pdfIn PDF document text
    • http://solezod.myartsonline.com/navy_eval_bullets_e6_opening_statements.pdfIn PDF document text
    • https://aa700e4b-9450-4a85-8b7e-8c92ffe47626.filesusr.com/ugd/de972d_7917190c29754a4c8decd660645c66d7.pdf?index=trueIn PDF document text
    • https://0b609444-e5a2-4a7e-9779-a3c6bae51a53.filesusr.com/ugd/529dbf_b84a56f88e954ea899d24563fca02ebd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/877fa918-1bcc-4dce-88b3-dc02ccacd895/xipowedupajetedezuwoto.pdfIn PDF document text
    • https://c2bc7a71-cb21-434c-84f6-8d2fc09ed56d.filesusr.com/ugd/03ae60_81107239fce64c3c80b4d3b5a91a8379.pdf?index=trueIn PDF document text
    • https://68f2566a-c586-4d15-a5d1-3a72044c38f3.filesusr.com/ugd/ecec20_2a01b34c310a4ab78f6e42e003addd3b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/cartoon_characters_pictures.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/vujikezanogovozatigopi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/244ffdd7-7c17-444d-b40a-6ec2bf93efcb/25799287278.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/2928690932.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDD 4944 bytes
SHA-256: 83e298e68387d0757e44a012d3a5def8249c066e058f636c40496c8eeb13b157
font_01_sfnt_off0000fe9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9E 11280 bytes
SHA-256: bfd75adf0f30b857c717182d2dbe45acb99be2aa483397b2aa79eb08f4583cdb
font_02_sfnt_off0001250e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1250E 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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