Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1cddb0ccc7ddc6a…

MALICIOUS

PDF

88.3 KB Created: 2021-03-22 09:57:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b55d0a2c0370c85222c43e2e82894be0 SHA-1: 19dffb19e1b603b8b3ccc8261f0290d4494b8249 SHA-256: a1cddb0ccc7ddc6a7897dd9fd1226d52ba2d07efaef788b87d4f382e485ae1e8
166 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. It uses a password-protected-archive lure. 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 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://golowaki.ru/123?utm_term=manual+de+taller+chevrolet+optra+2009 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4475389/normal_5fedc4149eac3.pdfIn PDF document text
    • http://drilltech.info/verizon_hotspot_setup_iphone0qpev.pdfIn PDF document text
    • http://zobotalemogi.sportsontheweb.net/84003327062.pdfIn PDF document text
    • http://lighttravel-ng.com/pasasusabugojegupozisykbqd.pdfIn PDF document text
    • http://vitonidero.medianewsonline.com/98689771781.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461777/normal_5ff65583cd9fb.pdfIn PDF document text
    • http://rasipafus.getenjoyment.net/tovimipetomokatemikisutum.pdfIn PDF document text
    • https://raguloduw.weebly.com/uploads/1/3/4/0/134041620/a26f9d.pdfIn PDF document text
    • http://creditscoreusa.info/how_to_connect_krk_rokit_5_to_pcd29ze.pdfIn PDF document text
    • http://instasurprise.online/why_does_my_lawn_mower_shut_off_when_i_engage_the_bladesstiny.pdfIn PDF document text
    • https://xukifunizagopo.weebly.com/uploads/1/3/4/0/134013279/7057678.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389074/normal_600e492f38e43.pdfIn PDF document text
    • https://wunurobi.weebly.com/uploads/1/3/4/8/134881210/femulukagifika.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443617/normal_602dfa8b29fab.pdfIn PDF document text
    • https://bopilopuneliniw.weebly.com/uploads/1/3/5/3/135304065/puvanun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412403/normal_6026af492bb33.pdfIn PDF document text
    • http://mon-cmbretagne.com/mi_primer_libro_de_contabilidad_descargar2ezyq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370791/normal_60220484b3bea.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/aeeda6ab-2682-46e9-8e75-194fcac514fd/gawijozudurabugeb.pdfIn PDF document text
    • http://rizivubonulej.atwebpages.com/89784432103.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7083b969-ad86-4b82-b601-6d448958fae3/2005_acura_rl_transmission_fluid_capacity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b2c1c25-a567-4035-86a4-4e5b288d91e2/83413461482.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/928485c6-8c5d-4b8c-8846-57c5f0c98257/equation_standard_enthalpy_change_of_combustion_of_propan-1-ol.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_off0001174d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1174D 5476 bytes
SHA-256: 05292ad061603a136a98dc85c1fcaaacc117df9b37d1d4d96cb1ffef6e6df758
font_01_sfnt_off000129fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129FB 12368 bytes
SHA-256: b2d096e180173887bc35aa22b50868c15bc336630b3895e02ddd382f98b84f31

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