Malicious PDF — malware analysis report

Static analysis result for SHA-256 43b25a9ffd3fc2eb…

MALICIOUS

PDF

88.6 KB Created: 2021-03-23 00:39:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1857a97d058bd36938bfc88cbd85092a SHA-1: 5864b07249bda7c71d78c37e3a5264a08964f67e SHA-256: 43b25a9ffd3fc2eb80b3bf90acfb0c06b6ef3386d4f03097145274b9bce0e3f1
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://golowaki.ru/aws?utm_term=whirlpool+9kg+6kg+washer+dryer+combo+manual PDF link annotation
    • https://cdn.sqhk.co/zesonixiv/hhhf5ii/gefupapepi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384301/normal_5fd60d64d3ee1.pdfIn PDF document text
    • http://ouily.xyz/how_to_remove_a_shower_handle_moenfnyfu.pdfIn PDF document text
    • http://detubogoxugovub.22web.org/pakixefekep.pdfIn PDF document text
    • http://medyahanem.com/412986409000bw7t.pdfIn PDF document text
    • http://erogan-encolumbia.site/56062300938vetrs.pdfIn PDF document text
    • http://teksol.xyz/dazer0kmht.pdfIn PDF document text
    • http://libumuzu.22web.org/ubuntu_14._04_iso_file_32_bit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422378/normal_601b2cfb13ead.pdfIn PDF document text
    • https://cdn.sqhk.co/bipozipo/geBifgi/doctor_on_demand_careers.pdfIn PDF document text
    • http://ferobuxanax.iblogger.org/10764173439.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370088/normal_6022c32782117.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
    • https://d17f4099-ecc1-42b1-9c73-51521793457c.filesusr.com/ugd/4a2613_bd786c8479a1476c8928870e82f92547.pdf?index=trueIn PDF document text
    • https://36fc1fe3-b646-4cc1-b6e9-de51469aea27.filesusr.com/ugd/3eb4bd_d0f4901d04844a5eaef2fcb58d692440.pdf?index=trueIn PDF document text
    • http://sokozujetabil.rf.gd/69346711019.pdfIn PDF document text
    • http://kepujelibip.epizy.com/lukakisiduxamazumifola.pdfIn PDF document text
    • https://3a5aa097-47f9-475f-9992-83bceef25cc3.filesusr.com/ugd/f55bec_bad03a56789c47149b38c84cf5f2ccb9.pdf?index=trueIn PDF document text
    • http://guvonudigadosa.epizy.com/32855315689.pdfIn PDF document text
    • http://midexudotag.epizy.com/33538842774.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_off00010c99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C99 6012 bytes
SHA-256: 7d297d1a02bd79b5f40216c02ecf50865f0687a076efd427991c383943db6972
font_01_sfnt_off000120e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120E5 10964 bytes
SHA-256: 636a868727331199d08a8b7349f898c579e0bbf8492b2bf004c233ddb0f8242e
font_02_sfnt_off00014649.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14649 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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