Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c70c47881cc85e8…

MALICIOUS

PDF

78.5 KB Created: 2021-03-03 00:41:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d9a792f59636dfe0eab34a3ba211642f SHA-1: 4948375e3b014a9146c5049fcc92bc7913cd7897 SHA-256: 3c70c47881cc85e8ab40039cb6f55294d0d736269d3a1611db70d233b48d5c0d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many pointing to disposable domains and potentially malicious content, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic and ML classification. The presence of external URIs and the ClamAV detection strongly suggest a phishing or malware distribution attempt. While no scripts were explicitly extracted, the nature of the embedded links and the PDF structure suggest an intent to redirect users to malicious sites, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/wix?keyword=intermatic+digital+wall+switch+timer+ej500c+manual PDF link annotation
    • http://viniveba.mywebcommunity.org/gifawetuwena.pdfIn PDF document text
    • http://lubenoredeji.mypressonline.com/levodopa_davis.pdfIn PDF document text
    • https://niguzagum.weebly.com/uploads/1/3/5/3/135390192/bekutap-gofitulitek-sevazosevivovon-xegubisi.pdfIn PDF document text
    • http://nuturejedekaw.22web.org/45726637788.pdfIn PDF document text
    • https://cdn.sqhk.co/woxiwovar/jjiochh/xofurusipavafidukidos.pdfIn PDF document text
    • http://online-bestshop.xyz/cisco_spark_plus_admin_guidekithe.pdfIn PDF document text
    • https://cdn.sqhk.co/kominepoli/ijbgigU/natepenegowegom.pdfIn PDF document text
    • https://cdn.sqhk.co/zufosupiz/fS0mXFp/elements_of_design_definition_size.pdfIn PDF document text
    • http://nujuxogo.iblogger.org/1606116073.pdfIn PDF document text
    • http://reetodo.online/migikiretijuxifemigowamez80qf.pdfIn PDF document text
    • http://mavidodi.iblogger.org/samsung_rfg298hdrs_manual.pdfIn PDF document text
    • http://greyfruit.space/how_to_pair_skullcandy_indy_wireless_headphonesuulsq.pdfIn PDF document text
    • http://derilezin.sportsontheweb.net/how_do_i_reset_my_alpine_radio.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fufopabi.rf.gd/husqvarna_125bvx_parts_uk.pdfIn PDF document text
    • http://muxawij.rf.gd/minecraft_unblocked_at_school.pdfIn PDF document text
    • http://vesedakowata.onlinewebshop.net/jumowifozabidabu.pdfIn PDF document text
    • http://tobegunobomu.rf.gd/is_daves_bread_keto_friendly.pdfIn PDF document text
    • http://robowogutalopet.epizy.com/actualiser_les_formules_excel_vba.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDB 5724 bytes
SHA-256: dc90ca3cb53cb272c4aa0102e6ef96a7966237b5ecf8f13c1cf202174cc8707c
font_01_sfnt_off00010038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10038 2048 bytes
SHA-256: f58dac70b5ce52bf81df34d1a822a0cb4f1e5c05be5d1d20ac4417136bd3fdfc
font_02_sfnt_off00010915.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10915 10100 bytes
SHA-256: 5768b863e7388967f69476c21f365def7dd1023c4f8eafb1023cbac1379f94c8

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