Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b4d299720033264…

MALICIOUS

PDF

79.4 KB Created: 2021-03-21 05:17:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: e9665fa86ddecc5293bdc5ae2c908590 SHA-1: aa75495644f3116a1b73556237c91407241b4a5b SHA-256: 5b4d299720033264a1ccb3b8b9fc31eff660215520835c464cbe15ba15417b4f
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic identifying a link to a known malicious redirector. Another critical heuristic indicates a large number of external PDF links, suggesting a link farm for SEO manipulation or malware distribution. ClamAV detection and ML classification further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest it's designed to redirect users to malicious sites, likely for phishing or to download further payloads.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/wix?keyword=real+property+tax+credit+form+it-214 In PDF document text
    • https://sasikeruxet.weebly.com/uploads/1/3/4/8/134851076/dimaku.pdfIn PDF document text
    • http://salizurewaki.mypressonline.com/dead_doctors_dont_lie_free_download.pdfIn PDF document text
    • http://gakmancreatures.ru/mediterranean_journal_of_social_sciencesvrhe0.pdfIn PDF document text
    • http://pozezan.mygamesonline.org/94401142000.pdfIn PDF document text
    • http://lidlid.xyz/14880534079ahjmf.pdfIn PDF document text
    • http://openchambre.xyz/4672459178481i5d.pdfIn PDF document text
    • http://gallery-shop.site/seventh_day_adventist_church_songs_freewzpih.pdfIn PDF document text
    • https://ronumotesagazuw.weebly.com/uploads/1/3/4/3/134373959/2300321.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/368c12d1-d0e1-4f25-b243-70a46ccc3ff6/dir_655_als_access_point.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/strong_acids_are_weak_electrolytes.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/facebook_logo_font_type.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/is_netflix_girlboss_based_on_a_true_story.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12fa360a-24c4-4986-b215-6af72825ca6a/blackberry_classic_2020_gsmarena.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fc89496-7ac5-49c0-8a8d-07911a8b59d6/zesegamoviwokiketo.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/derimepifadimepi.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/prenuptial_agreement_template_alberta.pdfIn PDF document text
    • http://bagugexasorip.myartsonline.com/40k_new_necron_codex.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/spectra_2_breast_pump_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1964b4ed-2c63-44d5-bc7f-855cf0b6b90b/at_t_moto_g6_play_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/69802392488.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9a4865b-d98b-41a9-8c05-fd00b6bd6b19/dark_souls_1_4_kings_location.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_off0000f3ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EA 5604 bytes
SHA-256: 8a25d55c528ca23b7da633f8f51398c1dce3d944a2c630bd441ca07520b18ff9
font_01_sfnt_off0001070b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1070B 11588 bytes
SHA-256: 47764894bb953a177a2c6fb99aff0e6235230626b573a7a2930db798c4f1c6d2

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