Malicious PDF — malware analysis report

Static analysis result for SHA-256 78eb148e35ffa2e0…

MALICIOUS

PDF

84.9 KB Created: 2021-03-27 09:58:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a53cadf199cc8a5a46e9e57deb941d68 SHA-1: 5dfe5fcfd79109eea42ffcbb8b7577574273c8ca SHA-256: 78eb148e35ffa2e07caaff009ef2b397abcfa0ab10ced52049b42a40732065f9
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 0.9995

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/award?keyword=alvarado+escala+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4419637/normal_60560323b8dc0.pdfIn PDF document text
    • https://bukodebavuv.weebly.com/uploads/1/3/4/6/134657655/lepasuwa_pibawizedene.pdfIn PDF document text
    • https://tabetigilazewa.weebly.com/uploads/1/3/5/3/135392987/fazisarelevivis.pdfIn PDF document text
    • http://itprod.space/daleretifokeduxv9kql.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378164/normal_600827f5db951.pdfIn PDF document text
    • http://microbladingeyebrowsdallastx.com/5783086810ji59s.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486521/normal_6014cfc8336cd.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/96588458229.pdfIn PDF document text
    • https://jivowewowigopap.weebly.com/uploads/1/3/1/6/131606746/nitugarokojivol.pdfIn PDF document text
    • https://sabutiwageb.weebly.com/uploads/1/3/5/9/135992853/6ac629.pdfIn PDF document text
    • http://hookup153.site/493589389909mxtm.pdfIn PDF document text
    • http://creditchecktotal.info/farming_simulator_2015_download_pc_free_full_gameodbl3.pdfIn PDF document text
    • http://tadolonelo.sportsontheweb.net/learn_korean_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489061/normal_5ff4a0530bc54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407813/normal_605af38c20fac.pdfIn PDF document text
    • http://vehicleinsusa.com/336204449154fcgy.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://zugepoguj.onlinewebshop.net/glory_glory_hallelujah_satb.pdfIn PDF document text
    • http://xomapagovujux.atwebpages.com/practical_english_phonetics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cd23552-3873-4fee-8f27-eb78dd1afe47/46965235417.pdfIn PDF document text
    • http://nubirumoxid.onlinewebshop.net/emotions_circle_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e1a07e7-0024-4d4d-b5fc-b9fc68339890/54293919772.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccaa8e69-43c7-485d-aac9-e5de79a9bb63/liwakedukalemaduzulij.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_off0001002b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1002B 4752 bytes
SHA-256: ba73fdca7e2c5d762244c7819a7902ab76b65018e8769b51d4211ef72f3a80b1
font_01_sfnt_off00011060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11060 11736 bytes
SHA-256: 3a1bfdf97230722ef65eee4e5eb4d75e8c779d746c05cf276edcdd269e70e696
font_02_sfnt_off0001368e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1368E 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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