Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc4b90101fef4342…

MALICIOUS

PDF

160.9 KB Created: 2021-03-13 22:56:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: dfa4d09da5a5ce07ce232c2aec6a30a4 SHA-1: 22c2e56ed616fc13979f44772a9972ab809777a7 SHA-256: dc4b90101fef434217de27ea6cf913e12b6473ba67bc1c1babda4b2ba3adb633
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 0.9992

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://baarspo.ru/award?keyword=expressive+aphasia+worksheets+pdf PDF link annotation
    • http://xotesefaj.22web.org/it_was_only_just_a_dream_lyrics.pdfIn PDF document text
    • http://lebuvowune.getenjoyment.net/netnography_doing_ethnographic_research_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387939/normal_5fd643ff01c6d.pdfIn PDF document text
    • https://wiwovadale.weebly.com/uploads/1/3/5/3/135322143/8b9fcd6c34dbaa.pdfIn PDF document text
    • https://zabaruwizugode.weebly.com/uploads/1/3/4/5/134596412/fa6e9.pdfIn PDF document text
    • http://fezatubiwe.getenjoyment.net/19725216175.pdfIn PDF document text
    • http://vebuwovivulab.mygamesonline.org/57299486764.pdfIn PDF document text
    • https://xevumijujivo.weebly.com/uploads/1/3/1/3/131383583/fb3ac89f42545.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384037/normal_5ffae1a191273.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391898/normal_6015b6cf2e5ce.pdfIn PDF document text
    • https://jezulusawuse.weebly.com/uploads/1/3/4/0/134000263/7786068.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503617/normal_60216b78196e4.pdfIn PDF document text
    • https://zoninezazazi.weebly.com/uploads/1/3/1/0/131070362/431604be03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473632/normal_60220c2214a39.pdfIn PDF document text
    • http://pofizivor.22web.org/contentious_probate_solicitors_near_me.pdfIn PDF document text
    • http://lowufadit.scienceontheweb.net/bsc_part_2_physics_practical_book_download.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/sixenogafopoj/elementary_english_conversation_topics.pdfIn PDF document text
    • http://ratobewiwigu.atwebpages.com/the_power_of_prayer_bruce_springsteen_traduzione.pdfIn PDF document text
    • http://verafewema.rf.gd/56142131446.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/arby_s_greek_salad_nutritional_information.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000224d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x224D7 5336 bytes
SHA-256: f048753605b254238c16c58d17958b048adf942ded34509217070c21ea08fc6d
font_01_sfnt_off00023713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23713 11896 bytes
SHA-256: 534f8603d4830df0e1eae88ffe2e47d37c035960b16bb796e8b34b8f7f27f1ce
font_02_sfnt_off00025f85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25F85 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

Open this report in the interactive analyzer, or submit your own file for analysis.