Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0e591d71a2ecad1…

MALICIOUS

PDF

70.5 KB Created: 2021-02-22 14:18:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c314c532da228a037d59bae26723d406 SHA-1: 105841968b7dafa842194d56f8db26d657467fc3 SHA-256: e0e591d71a2ecad1730f7e511d999ae431669a4abc18bf2ccde10dbb1336af76
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or scamming. The presence of embedded URLs suggests an attempt to lure users to external malicious sites, aligning with spearphishing tactics.

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
  • 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 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.
  • 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://crophysi.ru/wix?keyword=njrotc+navy+uniform+measurements In PDF document text
    • http://trixy-matrix.space/samsung_galaxy_s9_plus_battery_price_in_indialsfna.pdfIn PDF document text
    • http://premiumpornclips.com/277568686222y4wc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377933/normal_600831e01cc2a.pdfIn PDF document text
    • http://zigamesixeviru.22web.org/fimasupegevasi.pdfIn PDF document text
    • http://zanomafu.22web.org/cute_muslim_babies_images.pdfIn PDF document text
    • http://zijimesaxa.iblogger.org/93920436470.pdfIn PDF document text
    • http://xonukab.22web.org/damosupuse.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452839/normal_601b617f63c53.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sikadakomog.epizy.com/bodaref.pdfIn PDF document text
    • http://javamav.rf.gd/mail_de_motivation_candidature_spontane_informatique.pdfIn PDF document text
    • http://bakotisimipivok.rf.gd/metformin_lactic_acidosis_treatment_guidelines.pdfIn PDF document text
    • http://fovuderes.rf.gd/hp_laserjet_cp1215_toner_price.pdfIn PDF document text
    • http://nufukajipopo.rf.gd/cylindrically_guided_wave_technique.pdfIn PDF document text
    • http://batogegimuwew.rf.gd/bepujaj.pdfIn PDF document text
    • http://bedekopezedegej.rf.gd/75760766320.pdfIn PDF document text
    • http://sirilamezowi.epizy.com/android_developer_install_linux.pdfIn PDF document text
    • http://poresiz.epizy.com/biology_ncert_class_11th.pdfIn PDF document text
    • http://wojotefeva.rf.gd/sample_bio_data_form.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_off0000d8bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BC 5200 bytes
SHA-256: c1d26609cf8bc91c070d48e5572065c5ed6921c2458ae3a5ccd9a27b70ea2a4f
font_01_sfnt_off0000ea76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA76 10204 bytes
SHA-256: 9cb0dddbc85ba44eb6295a9699e0de758af425c7b3f0443c67fe69fac6fb5dbc

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