Malicious PDF — malware analysis report

Static analysis result for SHA-256 83e7539cd759758c…

MALICIOUS

PDF

79.9 KB Created: 2021-04-02 15:55:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 3d0fa8f3bd073162b012d77e867a8742 SHA-1: 19bccf2b287fa19c518471eea598b5890d3782e5 SHA-256: 83e7539cd759758c0ae30df5a18c990f2f15003714bd550093821c001982dd24
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one specifically targeting a search query for educational material, suggesting a phishing or malware distribution lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a common tactic of redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://druttle.ru/award?keyword=ncert+class+9+biology+book+pdf PDF link annotation
    • http://dofukatejipoz.66ghz.com/saucony_omni_iso_vs_guide_iso.pdfIn PDF document text
    • http://vexezujuzas.scienceontheweb.net/26909819505.pdfIn PDF document text
    • http://birabaguperije.iblogger.org/cellule_souche_embryonnaire.pdfIn PDF document text
    • http://volulolusawaz.mygamesonline.org/lavezirakukuzozige.pdfIn PDF document text
    • http://dukofinezamidol.22web.org/joint_venture_agreement_template_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mojefujal.rf.gd/sozeruzumaxuxufixeluta.pdfIn PDF document text
    • http://rasunafosav.epizy.com/level_118_brain_out_answer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79bd82d7-4779-44ba-8eeb-17591d1294ef/wurasiv.pdfIn PDF document text
    • https://ecfc1f44-6648-4072-bff5-6ee4adcfbe4f.filesusr.com/ugd/e5a943_9abc3fa1d5094c88b447cff17d7a138b.pdf?index=trueIn PDF document text
    • https://0df22b04-17ae-4e65-9af8-3af4445b4601.filesusr.com/ugd/71fd01_f9ad559b21cc4ae4b538eb6c51dfd6b0.pdf?index=trueIn PDF document text
    • http://wubifut.rf.gd/zagabivuxozevomom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8805802c-7a68-4011-8f1b-58bc994028fb/text_feature_list.pdfIn PDF document text
    • http://tapegazopiguw.rf.gd/graduation_name_card_template_free.pdfIn PDF document text
    • https://d920bd67-dfaf-4c99-85b0-fcb8118dfb91.filesusr.com/ugd/383849_6e51eec24f5c4c9b86fd7404aff49642.pdf?index=trueIn PDF document text
    • http://xigasew.epizy.com/interactive_spatial_data_analysis.pdfIn PDF document text
    • http://jazojogebi.rf.gd/mulapagowi.pdfIn PDF document text
    • http://rukukuwozar.epizy.com/59698504544.pdfIn PDF document text
    • https://c33c3ce4-fa2f-4f19-9477-7a801b41b29e.filesusr.com/ugd/ebbcbd_5341aab823e9472c8dcacd8f1560cf9f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5417d14f-1cdd-45ac-af6f-7b6f0e77f040/40606794591.pdfIn PDF document text
    • http://xukomaro.epizy.com/gikanalorujotol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d699ccdd-d9f0-4ae8-be62-91d88ada2234/what_are_some_good_hobbies_to_do.pdfIn PDF document text
    • https://6bc61794-ec17-45f1-96eb-8bed4cd57308.filesusr.com/ugd/217b8a_e868ab071f6047088a7349496c13dc91.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bbd7d2c-9c48-4730-89c0-d87ba034927f/88495830857.pdfIn PDF document text
    • http://bovinow.epizy.com/7988299927.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_off0000fa87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA87 5752 bytes
SHA-256: 0407bad38265fb31d568086555ce6e438b6ada64a803af468ad9e55cfa8a4492
font_01_sfnt_off00010e32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E32 10620 bytes
SHA-256: 79f660d8f598eb51d3781ce9d3bb3aeb377ef5276f143680e4937c1cf719c7b6

Open this report in the interactive analyzer, or submit your own file for analysis.