Malicious PDF — malware analysis report

Static analysis result for SHA-256 d99d1712d101ba26…

MALICIOUS

PDF

73.5 KB Created: 2021-03-13 14:16:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 01d0ecd741edbdcac858e1004ce72a74 SHA-1: 31f4de0cedf32dd1ce52b526bf87e9d19abe7f4b SHA-256: d99d1712d101ba26533d090bdca267d1c4bfa36157dff81dc2d6e97de3259831
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://druttle.ru/award?keyword=9th+grade+chemistry+test+pdf PDF link annotation
    • http://duzuxilobovix.iblogger.org/90981606743.pdfIn PDF document text
    • http://pollsexpert.com/kidotaravmghaj.pdfIn PDF document text
    • http://winoorama.site/461539657700w2up.pdfIn PDF document text
    • https://fovokutiro.weebly.com/uploads/1/3/5/9/135985190/girifudazutan.pdfIn PDF document text
    • https://rubusabulolow.weebly.com/uploads/1/3/5/3/135326577/16126.pdfIn PDF document text
    • http://lestyprin.online/one_button_library_arduinosirfe.pdfIn PDF document text
    • https://jinafoxel.weebly.com/uploads/1/3/4/5/134597088/gikare.pdfIn PDF document text
    • http://zatizoxitosake.22web.org/gitamabop.pdfIn PDF document text
    • http://putifid.iblogger.org/games_to_learn_english_for_adults.pdfIn PDF document text
    • https://nuravodabola.weebly.com/uploads/1/3/0/7/130740537/3d27c12f4bd48.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4304f9e-186d-4616-903a-c11adf20a5e4/what_does_purchase_allowance_mean_when_buying_a_car.pdfIn PDF document text
    • http://bupokapif.rf.gd/67181351586.pdfIn PDF document text
    • http://sojuwumupipijo.rf.gd/championship_manager_3_mac_free.pdfIn PDF document text
    • http://sutuguve.rf.gd/mebituxum.pdfIn PDF document text
    • http://bufiziwo.rf.gd/motipavupobomareza.pdfIn PDF document text
    • http://jabekufiji.epizy.com/lebalotatepurupo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e9348cd-c735-4630-8b2a-43e5ddcad2f0/38878052441.pdfIn PDF document text
    • http://zigexejumex.epizy.com/5994890686.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe7e3dd2-5a00-41a7-82c8-6bf1922517bf/how_to_live_365_days_a_year_dr_schindler.pdfIn PDF document text
    • http://gijenuja.epizy.com/auger_electron_spectroscopy_reference_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4beca9fa-3777-428a-83ae-06d34eb45232/pozafudu.pdfIn PDF document text
    • http://fezigaf.epizy.com/bogleheads_book.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_off0000e09e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE09E 5700 bytes
SHA-256: ad29368e0d40ac01e59df8aacc9d22ff8f8403d6c0821bcda4ad33ff76a2cb89
font_01_sfnt_off0000f3df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DF 10924 bytes
SHA-256: ce6a09e2bf768c78dd313a1a2b63e8ce3112333e051e041f7dc987cb6935b62a

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