Malicious PDF — malware analysis report

Static analysis result for SHA-256 83fe1aa3f89db574…

MALICIOUS

PDF

93.0 KB Created: 2021-04-05 09:55:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 646f5e937155444b37ed141451a9f2e1 SHA-1: 23cd9b86600dd0d2c201591f2ef85d87679d3096 SHA-256: 83fe1aa3f89db574b7ab71767460d57c517aa8c8a11ec8d9b0f38923a2027d87
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one prominent URL suggesting a phishing lure related to 'Lenovo g50-80 battery capacity'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://resalured.ru/aws?utm_term=lenovo+g50-80+battery+capacity PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408583/normal_5fda5f14bdd69.pdfIn PDF document text
    • http://lapitubemexidi.mywebcommunity.org/54716345898.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476432/normal_6026a15b272b6.pdfIn PDF document text
    • http://sunuzajiwexo.22web.org/35643080868.pdfIn PDF document text
    • https://devarewiwigunum.weebly.com/uploads/1/3/2/7/132710712/xopelagujononod.pdfIn PDF document text
    • http://birixuxewazotaz.mywebcommunity.org/20239213407.pdfIn PDF document text
    • http://rebemelo.22web.org/hp_color_laserjet_cp1215_printer_specifications.pdfIn PDF document text
    • http://bomepufibawil.scienceontheweb.net/baudrillard_simulacra_and_simulation_book.pdfIn PDF document text
    • http://tozofuji.scienceontheweb.net/aiag_ppap_manual_free_download.pdfIn PDF document text
    • https://xekuvezenigut.weebly.com/uploads/1/3/5/3/135346982/razavegoda.pdfIn PDF document text
    • http://narelavupes.22web.org/percent_water_in_a_hydrate_lab_answers.pdfIn PDF document text
    • https://siresikewutawin.weebly.com/uploads/1/3/0/7/130739490/taverarubiwor.pdfIn PDF document text
    • http://sokegex.mywebcommunity.org/active_listening_building_skills_for_understanding.pdfIn PDF document text
    • https://batuputuj.weebly.com/uploads/1/3/0/7/130739628/luzukovobufaxix.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/tumasun/50058654042.pdfIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/miller_syncrowave_250_dx_tig_torch.pdfIn PDF document text
    • https://19004eff-8f5e-45b0-b15a-9fbdbd99e39d.filesusr.com/ugd/578ea4_28716358d5324b6c957a24b074c45fd0.pdf?index=trueIn PDF document text
    • http://nukuzuxowilaz.epizy.com/beams_plus_guide_check_shirt.pdfIn PDF document text
    • https://0c7ecde5-8d52-4b6d-bf00-bcb9beb5fd3c.filesusr.com/ugd/b6f5a5_328a6549209c476db150d33b5cd5a469.pdf?index=trueIn PDF document text
    • https://2903667b-e544-4972-ac7f-e5855aaa9b37.filesusr.com/ugd/2cc660_e66d714a010f4c6ebdbc3fc671c1a5a6.pdf?index=trueIn PDF document text
    • http://rarezutawuwelam.epizy.com/gapovimurivegikopudadu.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/xizijamo.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000111ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111AC 5628 bytes
SHA-256: fa24d272eb8af85a8ef1ab6edae2d1a2c3d2303fea040de18578b67193be090b
font_01_sfnt_off00012504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12504 12888 bytes
SHA-256: 5bc89590a4c65612ea08849a8f9d525d407b8d3d6f0b6352d3f245c267084445
font_02_sfnt_off000150b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150B9 16272 bytes
SHA-256: 7f473fbeb240cfd762e47031fda27a20e16e8e8c4e830bafa60367f2f9cfb22a