Malicious PDF — malware analysis report

Static analysis result for SHA-256 96d24d5db1be2d7a…

MALICIOUS

PDF

90.8 KB Created: 2021-03-12 06:44:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2df8358a17a71b118ae585159908450c SHA-1: 54c4b54d0c5be246ca890933ec4403dc0ae527b5 SHA-256: 96d24d5db1be2d7a75a1bad8efbe8ea60c32588a35b30bcee1b6fb82789a7c52
186 Risk Score

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. 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 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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://baarspo.ru/123?utm_term=espn+nfl+reporter+salary PDF link annotation
    • https://zinebarovug.weebly.com/uploads/1/3/0/8/130814534/dixobotinoxuxo.pdfIn PDF document text
    • http://useporte.xyz/how_to_clean_a_mr.coffee_makeruuyxm.pdfIn PDF document text
    • https://zomimodobi.weebly.com/uploads/1/3/0/7/130739583/tisixaluj_butipokewuloka.pdfIn PDF document text
    • https://zugogulubituwo.weebly.com/uploads/1/3/4/2/134266111/fodibe-darerabotewo-wexigabax-ratebok.pdfIn PDF document text
    • https://talogaxuzule.weebly.com/uploads/1/3/4/5/134596774/4551972.pdfIn PDF document text
    • https://gunagabivap.weebly.com/uploads/1/3/4/8/134863042/fizipomoxowi.pdfIn PDF document text
    • http://idealica-italiaufficiale.website/todos_los_verbos_en_ingles_conjugados4y7q9.pdfIn PDF document text
    • https://xomuwesakutizid.weebly.com/uploads/1/3/5/3/135393414/tupofinugu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476445/normal_5febef7787560.pdfIn PDF document text
    • https://bixowupe.weebly.com/uploads/1/3/1/4/131409305/xewetejaliwebuzi.pdfIn PDF document text
    • http://lami-lashes.site/77227507291pxwip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479460/normal_5fda6f233a72b.pdfIn PDF document text
    • https://wejumarokurefa.weebly.com/uploads/1/3/0/7/130776247/mosoros-pivoledigu-bikunirana-lojiwuj.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://uploads.strikinglycdn.com/files/aa10c0da-5111-4aa7-8c34-fbf3727bcc0a/zodijinakewokibubitojudo.pdfIn PDF document text
    • https://dd39d194-9042-494f-90ab-223c96cf8da5.filesusr.com/ugd/5d3909_d970263363114ab494bf93c7aa082bfc.pdf?index=trueIn PDF document text
    • https://11ca5eb4-0abe-4d5d-8073-3f36f6088e80.filesusr.com/ugd/8b62d8_19072a51b08548e08c23178b527207c8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7aafa49e-2614-4484-843c-de7f4ff99904/52462786078.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a453dded-c901-4021-86ed-e179fe4cf4b2/dosotofojokinetowasi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0495685e-fc2b-4933-a132-c8cfed3412f2/is_there_going_to_be_a_michael_vey_book_8.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_off00011c30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C30 4696 bytes
SHA-256: e6e4b7c1ddd87cfa4e96708f39fcc4ec8957a1c5498cd933998c62a2afa537a2
font_01_sfnt_off00012c2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C2F 10496 bytes
SHA-256: b834545e7d89ad144655661f76daa5621248308a0f064929b7429b5e58b6d75c
font_02_sfnt_off00015028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15028 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e