Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e5130e5759a81b5…

MALICIOUS

PDF

77.0 KB Created: 2021-03-05 12:57:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 6f0dada5700906207531bd00e3bd61bc SHA-1: d1e1c9e2b783776c0e4754aef3ecebf0f7545fdc SHA-256: 6e5130e5759a81b5c5d8f6c8e60432f59fe321081a0620798d01305914879cf8
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicative of a link farm or phishing campaign. ClamAV detection and ML classification strongly suggest malicious intent. The presence of embedded JavaScript, though not directly analyzed for specific actions, is often used in PDFs to facilitate redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://pelibifir.ru/strik?utm_term=roland+r8+mk2 PDF link annotation
    • https://cdn.sqhk.co/jaxubefe/giihchj/skins_season_4_cast_imdb.pdfIn PDF document text
    • https://cdn.sqhk.co/tobamozusaj/ajgjdid/35536396293.pdfIn PDF document text
    • https://kimiligemapi.weebly.com/uploads/1/3/4/3/134343210/godizopedutula-morowom-vipajotivonan-napinosejolam.pdfIn PDF document text
    • https://cdn.sqhk.co/pirujezexod/kwajhmf/lego_duplo_marble_run_instructions.pdfIn PDF document text
    • http://rimka.xyz/create_json_from_dictionary_c_newtonsofty5krp.pdfIn PDF document text
    • https://lipigilukezi.weebly.com/uploads/1/3/5/3/135347924/3d7f8d7b906b0e.pdfIn PDF document text
    • https://lajexupizad.weebly.com/uploads/1/3/0/7/130775806/kesareji_xajigupi_gikamosevaxusi_derazufet.pdfIn PDF document text
    • http://biomanix.best/clculo_de_reas_con_integrales_ejercicios_resueltosr5a5l.pdfIn PDF document text
    • https://sirowatogiwu.weebly.com/uploads/1/3/2/8/132814809/4343008.pdfIn PDF document text
    • https://cdn.sqhk.co/bamebuxi/PJjbiaf/anime_wallpapers_4k_gif.pdfIn PDF document text
    • https://tupigupuji.weebly.com/uploads/1/3/4/7/134747984/ca9f48d79d.pdfIn PDF document text
    • https://lazumuron.weebly.com/uploads/1/3/4/8/134863931/pevavugedibebej.pdfIn PDF document text
    • https://xadixifiv.weebly.com/uploads/1/3/4/8/134888816/gisobijiv_mavokapiberuf.pdfIn PDF document text
    • https://vimasavugaf.weebly.com/uploads/1/3/4/5/134587410/15ad82f636da.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/gofiguj/fomugima.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/golden_sun_tla_class_guide.pdfIn PDF document text
    • https://ab737b70-891a-4a1f-8db9-ee548211cb31.filesusr.com/ugd/ce14f3_397eacef68dd403fbab0c0df7eb8f93a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/42021011009.pdfIn PDF document text
    • https://571cbd0a-ba82-408d-be6d-2df53a8fcfe5.filesusr.com/ugd/02af14_ab80acf03bbb4354b1ff19c041bcd6d2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/ocarina_tabs_music_sheets.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_off0000f1b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B9 5192 bytes
SHA-256: 4c7c65e26cfebe4c0732e8bc798af82dbfede2cb2880b8cc1a7551a8852b3781
font_01_sfnt_off00010349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10349 10396 bytes
SHA-256: 24fc8a3a896e59f4ee7706a5884f20ff51ab4a79942b81b3e383769637daa4b5

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