Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d06ac182851dcc4…

MALICIOUS

PDF

74.6 KB Created: 2021-06-06 02:39:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 49ee4d439271d22d1008960fcd8a43db SHA-1: cc124c1159885c4815966744b108c68b5ff55f86 SHA-256: 9d06ac182851dcc46eddd13863676dcae41dd5e93fbd126a575e3c1624cc95df
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm used for SEO manipulation or phishing. The primary external URL, 'https://infrive.ru/pbw?utm_term=how+to+use+teeth+whitening+activated+organic+charcoal+powder', is likely the intended destination for users, disguised as a guide to teeth whitening. No scripts were extracted, but the PDF structure and numerous external links strongly suggest a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://infrive.ru/pbw?utm_term=how+to+use+teeth+whitening+activated+organic+charcoal+powder PDF link annotation
    • https://benubusu.weebly.com/uploads/1/3/4/5/134577078/8ef5f53bc146c7.pdfIn PDF document text
    • https://turexebino.weebly.com/uploads/1/3/4/2/134265835/7041911.pdfIn PDF document text
    • https://bikizulotozenap.weebly.com/uploads/1/3/1/8/131860645/berijuputowaz.pdfIn PDF document text
    • https://rifakinuzofu.weebly.com/uploads/1/3/0/8/130815009/gedebasejuluzex.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/eb5cd75e-e964-4681-bb6c-fa33d32daef8/frances_cress_welsing_isis_papers_audiobook.pdfIn PDF document text
    • http://ropotupi.pbworks.com/f/completa_las_consecuencias_sociales_de_las_reformas_borbnicas_para_amrica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bf6f530-b3f1-43a0-ae49-2f13600bcdcd/how_to_get_free_fifa_coins_on_nintendo_switch_lite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2925908c-9869-4272-ac59-3d57712735d2/pokemon_yellow_official_strategy_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fbb6782-840a-4274-8db0-bd20eed1833c/rise_of_kingdoms_mod_apk_an1.pdfIn PDF document text
    • http://nuxawakaxaz.pbworks.com/f/72729682020.pdfIn PDF document text
    • http://mujefapufefi.pbworks.com/f/43187789432.pdfIn PDF document text
    • http://wurutaw.pbworks.com/w/file/fetch/144557349/amazon_mytv_login_code.pdfIn PDF document text
    • http://pezeliv.pbworks.com/w/file/fetch/144687930/12452148076.pdfIn PDF document text
    • http://wiliser.pbworks.com/f/84433904837.pdfIn PDF document text
    • http://mivegaz.pbworks.com/f/how_many_paragraphs_in_a_compare_and_contrast_essay.pdfIn PDF document text
    • http://ropotupi.pbworks.com/w/file/fetch/144526404/how_to_download_barbie_dreamhouse_adventures.pdfIn PDF document text
    • http://bijinim.pbworks.com/f/80392216870.pdfIn PDF document text
    • http://jazonewu.pbworks.com/w/file/fetch/144693942/12061492405.pdfIn PDF document text
    • http://sorawako.pbworks.com/f/tasasepetudukosutusajeful.pdfIn PDF document text
    • http://xifatarege.pbworks.com/f/how_to_clean_printheads_on_epson_artisan_1430.pdfIn PDF document text
    • http://kunixove.pbworks.com/f/rebelefivamisumez.pdfIn PDF document text
    • http://bofamawetodo.pbworks.com/w/file/fetch/144604986/fahrenheit_451_quotes_with_page_numbers_and_explanations.pdfIn PDF document text
    • http://deduxofevit.pbworks.com/w/file/fetch/144680541/what_is_data_abstraction_definition.pdfIn PDF document text
    • http://disisopaz.pbworks.com/w/file/fetch/144544932/seville_classics_fan_repair_manual.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_off0000e3ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BA 5448 bytes
SHA-256: 893f9851c57fe3187325e55095108382e6e49db8ddbb5cc4aa5d19e443538768
font_01_sfnt_off0000f653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF653 10736 bytes
SHA-256: e8221d04877a23da98884bf719bdf7e720c9126e3dcee428c4ef566d1e55c4c3

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