Malicious PDF — malware analysis report

Static analysis result for SHA-256 673b8e7e25bf7444…

MALICIOUS

PDF

80.1 KB Created: 2021-06-06 07:00:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 800b403a26bf319b8250648a6ffba55b SHA-1: 99af78ea4ae768359313c1245cefed7062ab33f2 SHA-256: 673b8e7e25bf7444761a415bb80c0d674836842dcb549e9ddbdb0b672de5bd73
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 0.9997

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 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://drafthe.ru/pbw?utm_term=symantec+dlp+installation+guide+15.1 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366642/normal_601108bd52205.pdfIn PDF document text
    • https://tigidejuremu.weebly.com/uploads/1/3/4/5/134502839/9b2e45eac.pdfIn PDF document text
    • https://bawejitomu.weebly.com/uploads/1/3/1/4/131438353/6077725.pdfIn PDF document text
    • https://mugilofovoki.weebly.com/uploads/1/3/4/6/134616553/filupogigix.pdfIn PDF document text
    • https://dironirodog.weebly.com/uploads/1/3/4/7/134760169/8183040.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381529/normal_604313858309a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393209/normal_6057c5187fa65.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
    • http://bopelijexuf.pbworks.com/f/vertical_diet_3.0_free_reddit.pdfIn PDF document text
    • http://vogituvu.pbworks.com/w/file/fetch/144507621/18251140815.pdfIn PDF document text
    • http://minuwaxiper.pbworks.com/w/file/fetch/144631560/sewexabusenenifoga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19ebce4e-a397-48c1-b918-b97b2407cb3d/which_of_the_following_is_an_example_of_selective_exposure.pdfIn PDF document text
    • http://faxamom.pbworks.com/f/24499844199.pdfIn PDF document text
    • http://jejosuxiz.pbworks.com/w/file/fetch/144496230/osmosis_and_hypotonic_hypertonic_and_isotonic_solutions_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01ff0f93-5262-47e7-917d-69fbea8c4ccd/zetodafeduvolewujofalo.pdfIn PDF document text
    • http://rozeluf.pbworks.com/f/tezuwitetopekoxe.pdfIn PDF document text
    • http://zufumegi.pbworks.com/w/file/fetch/144422358/jufojekibitox.pdfIn PDF document text
    • http://zowonixepor.pbworks.com/w/file/fetch/144461604/how_to_use_samsung_xpress_m2026w.pdfIn PDF document text
    • http://funinupun.pbworks.com/w/file/fetch/144426024/94167419754.pdfIn PDF document text
    • http://kelivesas.pbworks.com/f/what_are_some_biotic_and_abiotic_factors_in_the_tropical_rainforest.pdfIn PDF document text
    • http://gapufipi.pbworks.com/f/present_progressive_irregular_forms_3b_4_answers.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_off0000ecb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB3 5592 bytes
SHA-256: f16218d320296eb7abaa23eaca0d1f87998a48edb82b4849857ed4be8129ca58
font_01_sfnt_off0000ffae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAE 10752 bytes
SHA-256: e564806a74cebb5009f29e18a18d70e366c62463277622f3e5c3632bcd4fc303
font_02_sfnt_off00012444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12444 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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