Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5bfb17c76c7ad67…

MALICIOUS

PDF

79.2 KB Created: 2021-03-17 15:07:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 4567c95621577b60d0c6152818efc7c1 SHA-1: b126af709652c3feb65684042f7481ce4d895233 SHA-256: e5bfb17c76c7ad67649c74b0b42c3110218527ed97139e59219c0e3eb28b618f
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with 'https://maypoin.ru/award?keyword=bjti+berthing+plan+pdf' and 'http://psylath.com/sansa_clip_charger_cable0i4kn.pdf' being particularly suspicious due to their unknown reputation and link farm heuristic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • 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://maypoin.ru/award?keyword=bjti+berthing+plan+pdf PDF link annotation
    • http://psylath.com/sansa_clip_charger_cable0i4kn.pdfIn PDF document text
    • http://riniwodifole.medianewsonline.com/9982742471.pdfIn PDF document text
    • http://lnstagramsupportinfo.com/what_song_plays_at_the_end_of_evangelion1pk7e.pdfIn PDF document text
    • http://mitidogifomasis.iblogger.org/phonological_awareness_skills_program_test.pdfIn PDF document text
    • http://wosozage.mypressonline.com/19032938593.pdfIn PDF document text
    • http://ibkreactiva2020.com/lesunopifibejivanudun23oby.pdfIn PDF document text
    • http://fakts.design/adding_fractions_with_like_denominators_free_worksheetsn9k8l.pdfIn PDF document text
    • http://varistop.site/lg_oled_tv_refresh_ratemqll8.pdfIn PDF document text
    • https://www.pelindo.co.id/profil-perusahaan/cabang-anak-perusahaan/cabang-peIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/duguzefowibaz.pdfIn PDF document text
    • https://45ed8376-e832-497f-ab20-0a31924dc5db.filesusr.com/ugd/4b7290_9a9e8563923b49b3b9481e6a331735a9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffa9b7ea-86ff-4110-a49e-98b27587ab7c/gejakebaviguxewanovez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8478dab7-60d8-4811-adec-2989775cc164/how_do_you_know_theres_something_wrong_with_your_kidneys.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/skyrim_gameplay_guide.pdfIn PDF document text
    • https://1b6fe947-be7e-4494-9a94-f566f178d3d1.filesusr.com/ugd/89064d_1daab1a0760e4694a9457db1c90c6f28.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e68bedcf-8a2d-47b6-9d2d-1a2aadb4975f/why_does_alignment_fail_on_hp_printer.pdfIn PDF document text
    • http://vepitejususas.atwebpages.com/convert_file_into_word_document_online.pdfIn PDF document text
    • http://dujefukuboxus.epizy.com/creative_problem_solving_tools.pdfIn PDF document text
    • https://a815f367-2516-4b88-9496-eed07d5c1eb7.filesusr.com/ugd/665c20_7dba19b5f61a46c48933383850f25532.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/95792433519.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/how_to_deal_with_conflict_social_work.pdfIn PDF document text
    • https://c3373aeb-ed74-4f2d-b631-fa679e0a3f6f.filesusr.com/ugd/cbe7f7_4802664af7ff40a7b31af669af623815.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f13d583-4c36-48b5-8ea5-386e5200f309/56520604045.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/56157386827.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_off0000f609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF609 5392 bytes
SHA-256: 575677a49a2e0e255528fe7bfa14f38c9429f9ace63a5c11ed67aaebc52081a9
font_01_sfnt_off0001085f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1085F 11664 bytes
SHA-256: 867c8a5290147e024990ba6ac98ec090347964075314d7539313491772bd04bd