Malicious PDF — malware analysis report

Static analysis result for SHA-256 01ccb1e40e085859…

MALICIOUS

PDF

86.2 KB Created: 2021-03-14 06:58:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 3588e6dbc21fd5d5190e05e7fe420188 SHA-1: f139d53bf3d7b7918b3f9c8e8b3e71a27c33f294 SHA-256: 01ccb1e40e085859c3d24db6f7d48289e82846dae93f2ba03d3b04517113a67d
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to disposable hosting, and one specifically targets a search term related to 'antivirus online para android', suggesting a phishing or scam lure. The presence of external URIs and link farm heuristics further supports the attack pattern of redirecting users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • 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://nipisod.ru/123?utm_term=antivirus+online+para+android PDF link annotation
    • https://rofoxanubojinud.weebly.com/uploads/1/3/2/7/132740779/gexitejameruri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385415/normal_5fdc43e70a302.pdfIn PDF document text
    • https://difototasewi.weebly.com/uploads/1/3/5/9/135986065/tulawo_samonitixofepiw_befuboduz_verifuwipukedax.pdfIn PDF document text
    • https://zideloxilatomi.weebly.com/uploads/1/3/5/3/135325243/kesapetugiku.pdfIn PDF document text
    • http://vigikigopaloze.medianewsonline.com/vizio_sound_bar_ge_universal_remote_code.pdfIn PDF document text
    • https://koruguliduni.weebly.com/uploads/1/3/4/8/134896859/4022697.pdfIn PDF document text
    • http://muvepifare.mygamesonline.org/67588687729.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393020/normal_5fd768d2c538e.pdfIn PDF document text
    • http://zonizubiro.getenjoyment.net/how_much_pawn_shop_make.pdfIn PDF document text
    • http://xuroriwonufuz.scienceontheweb.net/windows_active_directory_tutorial.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475854/normal_6041143b9a74e.pdfIn PDF document text
    • http://wugumonisukanib.sportsontheweb.net/how_to_connect_my_hp_deskjet_2622_to_wifi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417827/normal_5fdff571193d9.pdfIn PDF document text
    • https://gubizelejipeter.weebly.com/uploads/1/3/4/1/134131403/6096864.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/asvab_math_practice_questions_and_answers.pdfIn PDF document text
    • http://gedemuzufo.epizy.com/cbse_biology_class_11_ncert.pdfIn PDF document text
    • http://vekejuf.atwebpages.com/novation_launchkey_49_driver.pdfIn PDF document text
    • http://vawanumezal.onlinewebshop.net/ngo_bylaws_in_english.pdfIn PDF document text
    • http://dufowuburaji.rf.gd/what_does_the_bible_mean_by_a_pure_heart.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/cascading_style_sheets_means.pdfIn PDF document text
    • http://puzawibopuxeluv.epizy.com/1007177353.pdfIn PDF document text
    • https://s3.amazonaws.com/jivala/hvac_technician_resume_template.pdfIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/afterlight_apk_1._0._6.pdfIn PDF document text
    • http://solejow.myartsonline.com/william_blake_paintings_london.pdfIn PDF document text
    • http://nunetam.epizy.com/85679021445.pdfIn PDF document text
    • http://jidabalelibixu.rf.gd/23455710416.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/67236023043.pdfIn PDF document text
    • http://vimixof.onlinewebshop.net/vutapalixagategunokudojo.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_off0001144d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1144D 5000 bytes
SHA-256: 7d3d35499f81873ed5c16642d14df76c1014f68c702d6d77e402991eb860965c
font_01_sfnt_off0001255f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1255F 11088 bytes
SHA-256: cff8e77e60b477e580d8e6ad88ef101546ca5c5f865b9472c202cae6895803a8