Malicious PDF — malware analysis report

Static analysis result for SHA-256 954699524f7ded29…

MALICIOUS

PDF

82.0 KB Created: 2021-03-02 06:59:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: b004e1721cb453f555d0acdcd988a08a SHA-1: cd6ee26a436b9d61377c589fe1bb825f5329b19e SHA-256: 954699524f7ded296dda4b1c817c416f3f4efe95fdd2d30f6c25ad74d215793b
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a phishing lure attempting to redirect users to a site that may host further malicious content.

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://dugedepap.ru/strik?utm_term=vintage+guitar+price+guide+online+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4411501/normal_6030df4b45d20.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421627/normal_5fc69c3506ac7.pdfIn PDF document text
    • http://jadogaxarabu.mygamesonline.org/72546434145.pdfIn PDF document text
    • http://lefefegibilapo.22web.org/novatikumixusisadezat.pdfIn PDF document text
    • http://juwaniwabi.medianewsonline.com/navepe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415052/normal_6035482842924.pdfIn PDF document text
    • http://faxusupovetek.sportsontheweb.net/dcs-930_lb_software.pdfIn PDF document text
    • http://zizodoroluxonaf.sportsontheweb.net/is_python_enough_for_machine_learning.pdfIn PDF document text
    • http://titanof-filtr.ru/javascript_array_methods_cheat_sheetjr7ey.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414678/normal_5fdbb2aba6d28.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bolizubixekop.rf.gd/lame_enc._dll_audacity_2._0._6_free.pdfIn PDF document text
    • http://pibasas.epizy.com/fuvidurusofegonu.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/astm_a105_standard_specification.pdfIn PDF document text
    • http://vigexosav.myartsonline.com/fegawapavelozowevenorerev.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/ruvivunulesafizo.pdfIn PDF document text
    • http://wijetifosoxi.epizy.com/best_interracial_dating_apps_for_android.pdfIn PDF document text
    • http://nalosig.rf.gd/herbalism_gold_guide_bfa.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/justadice_piano_sheet_music.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eed7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED7 5112 bytes
SHA-256: 14bfa26f2b9c1a22012a2fee196ba1809b0105f2bd143e520e7a730d23d8298e
font_01_sfnt_off00010056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10056 10660 bytes
SHA-256: 0e82dbdb0fdc49f3fc8bec238d81f2ac5ab0e6d34fda1541768e3beaf0ca145d
font_02_sfnt_off000124e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124E2 16164 bytes
SHA-256: 6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3

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