Malicious PDF — malware analysis report

Static analysis result for SHA-256 49ef1afbc5249d4b…

MALICIOUS

PDF

125.8 KB Created: 2021-03-20 08:50:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 87294019324c128cb192fc04feb230c2 SHA-1: 2e6e3698797dd6e85700f5887c8207ad6334ff1b SHA-256: 49ef1afbc5249d4b9da1c3eec83aa48f5c32295d67f9d84148f88412602ce0d1
186 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 0.9998

Heuristics 6

  • 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.
  • 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://maypoin.ru/wix?keyword=sate+pestage+return+of+the+jedi PDF link annotation
    • https://senajadodum.weebly.com/uploads/1/3/1/3/131379015/9727814.pdfIn PDF document text
    • https://kikizesojumare.weebly.com/uploads/1/3/4/7/134718780/7386ff6ec.pdfIn PDF document text
    • https://nagiwudulowep.weebly.com/uploads/1/3/0/7/130775657/fasolodiketawajamogu.pdfIn PDF document text
    • http://zonokiwuwagupu.getenjoyment.net/how_much_do_soccer_referees_get_paid_in_south_africa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464522/normal_5ff5b35f36848.pdfIn PDF document text
    • https://fetepidema.weebly.com/uploads/1/3/4/6/134684810/55ea98fae5742.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370746/normal_60449224288e5.pdfIn PDF document text
    • http://verifiedbadges-form.com/greek_mythology_short_storieshu3h8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370073/normal_6036947f3eea4.pdfIn PDF document text
    • http://rusherx.studio/20109726308hlk8l.pdfIn PDF document text
    • http://dompodklyuch.com/lisobuwujud7ri0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424933/normal_60054966d2eb8.pdfIn PDF document text
    • https://nosozekime.weebly.com/uploads/1/3/4/6/134634018/zivaleni-debura-gojob-xemena.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/17205655397.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41ae0e54-c6d7-4477-adbd-d97e85a2584d/washington_dc_weather_in_january_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a3750d6-5cba-46d4-9388-4045ece6aa5f/82561860244.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b52d49e-1870-4e92-a422-e68813e67b47/my_soundpeats_stopped_working.pdfIn PDF document text
    • http://kedisijusa.onlinewebshop.net/87297051200.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/037c28b3-5384-4ae3-abca-d3ec9c01b1e6/how_to_install_chrome_on_lg_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20e7fb61-2723-4d6c-bf1d-3ae767c7e5e9/suxuvepo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f1ec467-b839-4ff9-b026-e191938324ac/how_to_clean_avent_sterilizer_3_in_1.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_off0001b12f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B12F 5448 bytes
SHA-256: db2bf371a6c075cc26c8da55e3b59b4ded95e039d5f82dbfe6738b3acc636e29
font_01_sfnt_off0001c3b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C3B2 11344 bytes
SHA-256: d72c7054eeb0c5cb98bae2ebe36a2b2ef898d8696d342cde12f010aa3c513b85

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